Fedora40 ; Tripwire , Logwatch , DiCE , ディスク使用率チェックスクリプト導入

Contents

Tripwire インストール
Logwatch導入
DiCEのインストール
ディスク使用率チェックスクリプト導入
- 1 スクリプト作成
- 2 実行確認

Tripwire インストール

1.インストール

# dnf -y install tripwire

1	# dnf -y install tripwire

2.パスフレーズ設定

# tripwire-setup-keyfiles

----------------------------------------------
The Tripwire site and local passphrases are used to sign a  variety  of
files, such as the configuration, policy, and database files.

Passphrases should be at least 8 characters in length and contain  both
letters and numbers.

See the Tripwire manual for more information.

----------------------------------------------
Creating key files...

(When selecting a passphrase, keep in mind that good passphrases typically
have upper and lower case letters, digits and punctuation marks, and are
at least 8 characters in length.)

Enter the site keyfile passphrase:  ←任意の「サイトパスフレーズ」を入力
Verify the site keyfile passphrase: ←再度「サイトパスフレーズ」を入力
Generating key (this may take several minutes)...Key generation complete.

(When selecting a passphrase, keep in mind that good passphrases typically
have upper and lower case letters, digits and punctuation marks, and are
at least 8 characters in length.)

Enter the local keyfile passphrase:  ←任意の「ローカルパスフレーズ」を入力
Verify the local keyfile passphrase: ←再度「ローカルパスフレーズ」を入力
Generating key (this may take several minutes)...Key generation complete.

----------------------------------------------
Signing configuration file...
Please enter your site passphrase:  ←「サイトパスフレーズ」を入力
Wrote configuration file: /etc/tripwire/tw.cfg

A clear-text version of the Tripwire configuration file:
/etc/tripwire/twcfg.txt
has been preserved for your inspection.  It  is  recommended  that  you
move this file to a secure location and/or encrypt it in place (using a
tool such as GPG, for example) after you have examined it.


----------------------------------------------
Signing policy file...
Please enter your site passphrase:  ←「サイトパスフレーズ」を入力
Wrote policy file: /etc/tripwire/tw.pol

A clear-text version of the Tripwire policy file:
/etc/tripwire/twpol.txt
has been preserved for  your  inspection.  This  implements  a  minimal
policy, intended only to test  essential  Tripwire  functionality.  You
should edit the policy file to  describe  your  system,  and  then  use
twadmin to generate a new signed copy of the Tripwire policy.

Once you have a satisfactory Tripwire policy file, you should move  the
clear-text version to a secure location  and/or  encrypt  it  in  place
(using a tool such as GPG, for example).

Now run "tripwire --init" to enter Database Initialization  Mode.  This
reads the policy file, generates a database based on its contents,  and
then cryptographically signs the resulting  database.  Options  can  be
entered on the command line to specify which policy, configuration, and
key files are used  to  create  the  database.  The  filename  for  the
database can be specified as well. If no  options  are  specified,  the
default values from the current configuration file are used.

# tripwire-setup-keyfiles

----------------------------------------------

The Tripwire site and local passphrases are used to sign a variety of

files, such as the configuration, policy, and database files.

Passphrases should be at least 8 characters in length and contain both

letters and numbers.

See the Tripwire manual for more information.

----------------------------------------------

Creating key files...

(When selecting a passphrase, keep in mind that good passphrases typically

have upper and lower case letters, digits and punctuation marks, and are

at least 8 characters in length.)

Enter the site keyfile passphrase: ←任意の「サイトパスフレーズ」を入力

Verify the site keyfile passphrase: ←再度「サイトパスフレーズ」を入力

Generating key (this may take several minutes)...Key generation complete.

(When selecting a passphrase, keep in mind that good passphrases typically

have upper and lower case letters, digits and punctuation marks, and are

at least 8 characters in length.)

Enter the local keyfile passphrase: ←任意の「ローカルパスフレーズ」を入力

Verify the local keyfile passphrase: ←再度「ローカルパスフレーズ」を入力

Generating key (this may take several minutes)...Key generation complete.

----------------------------------------------

Signing configuration file...

Please enter your site passphrase: ←「サイトパスフレーズ」を入力

Wrote configuration file: /etc/tripwire/tw.cfg

A clear-text version of the Tripwire configuration file:

/etc/tripwire/twcfg.txt

has been preserved for your inspection. It is recommended that you

move this file to a secure location and/or encrypt it in place (using a

tool such as GPG, for example) after you have examined it.

----------------------------------------------

Signing policy file...

Please enter your site passphrase: ←「サイトパスフレーズ」を入力

Wrote policy file: /etc/tripwire/tw.pol

A clear-text version of the Tripwire policy file:

/etc/tripwire/twpol.txt

has been preserved for your inspection. This implements a minimal

policy, intended only to test essential Tripwire functionality. You

should edit the policy file to describe your system, and then use

twadmin to generate a new signed copy of the Tripwire policy.

Once you have a satisfactory Tripwire policy file, you should move the

clear-text version to a secure location and/or encrypt it in place

(using a tool such as GPG, for example).

Now run "tripwire --init" to enter Database Initialization Mode. This

reads the policy file, generates a database based on its contents, and

then cryptographically signs the resulting database. Options can be

entered on the command line to specify which policy, configuration, and

key files are used to create the database. The filename for the

database can be specified as well. If no options are specified, the

default values from the current configuration file are used.

3.Tripwire の設定

①設定ファイル編集

# vi /etc/tripwire/twcfg.txt

●9 行目あたり
行頭に「#」を追加し、その下の行に「LOOSEDIRECTORYCHECKING =true」を追加します。
●12 行目あたり
行頭に「#」を追加し、その下の行に「REPORTLEVEL =4」を追加します。
レベル4 にすることで「0 」～「4 」までの5 段階中、最も詳細なレポートが表示されます。
#REPORTLEVEL =3
REPORTLEVEL =4

# vi /etc/tripwire/twcfg.txt

●9 行目あたり

行頭に「#」を追加し、その下の行に「LOOSEDIRECTORYCHECKING =true」を追加します。

●12 行目あたり

行頭に「#」を追加し、その下の行に「REPORTLEVEL =4」を追加します。

レベル4 にすることで「0 」～「4 」までの5 段階中、最も詳細なレポートが表示されます。

#REPORTLEVEL =3

REPORTLEVEL =4

②Tripwire 設定ファイル(暗号署名版)を作成

# twadmin -m F -c /etc/tripwire/tw.cfg -S /etc/tripwire/site.key /etc/tripwire/twcfg.txt
Please enter your site passphrase: ←サイトパスフレーズを入力
Wrote configuration file: /etc/tripwire/tw.cfg

# twadmin -m F -c /etc/tripwire/tw.cfg -S /etc/tripwire/site.key /etc/tripwire/twcfg.txt

Please enter your site passphrase: ←サイトパスフレーズを入力

Wrote configuration file: /etc/tripwire/tw.cfg

③Tripwire 設定ファイル(テキスト版)削除

# rm -f /etc/tripwire/twcfg.txt

1	# rm -f /etc/tripwire/twcfg.txt

④ポリシーファイル設定

# cd /etc/tripwire/
# vi twpolmake.pl

1 2	# cd /etc/tripwire/ # vi twpolmake.pl

twpolmake.plの内容

#!/usr/bin/perl
# Tripwire Policy File customize tool
#
$POLFILE=$ARGV[0];

open(POL,"$POLFILE") or die "open error: $POLFILE" ;
my($myhost,$thost) ;
my($sharp,$tpath,$cond) ;
my($INRULE) = 0 ;

while (<POL>) {
chomp;
if (($thost) = /^HOSTNAME\s*=\s*(.*)\s*;/) {
$myhost = `hostname` ; chomp($myhost) ;
if ($thost ne $myhost) {
$_="HOSTNAME=\"$myhost\";" ;
}
}
elsif ( /^{/ ) {
$INRULE=1 ;
}
elsif ( /^}/ ) {
$INRULE=0 ;
}
elsif ($INRULE == 1 and ($sharp,$tpath,$cond) = /^(\s*\#?\s*)(\/\S+)\b(\s+->\s+.+)$/) {
$ret = ($sharp =~ s/\#//g) ;
if ($tpath eq '/sbin/e2fsadm' ) {
$cond =~ s/;\s+(tune2fs.*)$/; \#$1/ ;
}
if (! -s $tpath) {
$_ = "$sharp#$tpath$cond" if ($ret == 0) ;
}
else {
$_ = "$sharp$tpath$cond" ;
}
}
print "$_\n" ;
}
close(POL) ;

#!/usr/bin/perl

# Tripwire Policy File customize tool

$POLFILE=$ARGV[0];

open(POL,"$POLFILE") or die "open error: $POLFILE" ;

my($myhost,$thost) ;

my($sharp,$tpath,$cond) ;

my($INRULE) = 0 ;

while (<POL>) {

chomp;

if (($thost) = /^HOSTNAME\s*=\s*(.*)\s*;/) {

$myhost = `hostname` ; chomp($myhost) ;

if ($thost ne $myhost) {

$_="HOSTNAME=\"$myhost\";" ;

}

elsif ( /^{/ ) {

$INRULE=1 ;

}

elsif ( /^}/ ) {

$INRULE=0 ;

}

elsif ($INRULE == 1 and ($sharp,$tpath,$cond) = /^(\s*\#?\s*)(\/\S+)\b(\s+->\s+.+)$/) {

$ret = ($sharp =~ s/\#//g) ;

if ($tpath eq '/sbin/e2fsadm' ) {

$cond =~ s/;\s+(tune2fs.*)$/; \#$1/ ;

}

if (! -s $tpath) {

$_ = "$sharp#$tpath$cond" if ($ret == 0) ;

}

else {

$_ = "$sharp$tpath$cond" ;

}

print "$_\n" ;

}

close(POL) ;

⑤ポリシーファイル最適化

# perl /etc/tripwire/twpolmake.pl /etc/tripwire/twpol.txt > /etc/tripwire/twpol.txt.new

1	# perl /etc/tripwire/twpolmake.pl /etc/tripwire/twpol.txt > /etc/tripwire/twpol.txt.new

⑥最適化済ポリシーファイルを元に、ポリシーファイル(暗号署名版)作成

# twadmin -m P -c /etc/tripwire/tw.cfg -p /etc/tripwire/tw.pol -S /etc/tripwire/site.key /etc/tripwire/twpol.txt.new

Please enter your site passphrase: ←サイトパスフレーズを入力
Wrote policy file: /etc/tripwire/tw.pol

# twadmin -m P -c /etc/tripwire/tw.cfg -p /etc/tripwire/tw.pol -S /etc/tripwire/site.key /etc/tripwire/twpol.txt.new

Please enter your site passphrase: ←サイトパスフレーズを入力

Wrote policy file: /etc/tripwire/tw.pol

⑦データベースを作成、動作確認

# tripwire -m i -s -c /etc/tripwire/tw.cfg
Please enter your local passphrase: ←ローカルパスフレーズを入力

1 2	# tripwire -m i -s -c /etc/tripwire/tw.cfg Please enter your local passphrase: ←ローカルパスフレーズを入力

テスト用ファイルを作成

# echo test > /root/test.txt

1	# echo test > /root/test.txt

Tripwire の動作確認

# tripwire -m c -s -c /etc/tripwire/tw.cfg
下記のように表示されればOK

Open Source Tripwire(R) 2.4.3.7 Integrity Check Report

Report generated by:          root
Report created on:            Sun 28 Apr 2024 10:45:00 AM JST
Database last updated on:     Never

===============================================================================
Report Summary:
===============================================================================

Host name:                    Lepard
Host IP address:              192.168.11.83
Host ID:                      None
Policy file used:             /etc/tripwire/tw.pol
Configuration file used:      /etc/tripwire/tw.cfg
Database file used:           /var/lib/tripwire/Lepard.twd
Command line used:            tripwire -m c -s -c /etc/tripwire/tw.cfg

===============================================================================
Rule Summary:
===============================================================================

-------------------------------------------------------------------------------
  Section: Unix File System
-------------------------------------------------------------------------------

  Rule Name                       Severity Level    Added    Removed  Modified
  ---------                       --------------    -----    -------  --------
  User binaries                   66                0        0        0
  Tripwire Binaries               100               0        0        0
  Libraries                       66                0        0        0
  Operating System Utilities      100               0        0        0
  File System and Disk Administraton Programs
                                  100               0        0        0
  Kernel Administration Programs  100               0        0        0
  Networking Programs             100               0        0        0
  System Administration Programs  100               0        0        0
  Hardware and Device Control Programs
                                  100               0        0        0
  System Information Programs     100               0        0        0
  (/sbin/runlevel)
  Application Information Programs
                                  100               0        0        0
  (/sbin/rtmon)
  Critical Utility Sym-Links      100               0        0        0
  Shell Binaries                  100               0        0        0
  Critical system boot files      100               0        0        0
* Tripwire Data Files             100               1        0        0
  System boot changes             100               0        0        0
  OS executables and libraries    100               0        0        0
  Security Control                100               0        0        0
  Login Scripts                   100               0        0        0
  Critical configuration files    100               0        0        0
* Root config files               100               1        0        0
  Invariant Directories           66                0        0        0
  Temporary directories           33                0        0        0
  Critical devices                100               0        0        0

Total objects scanned:  75585
Total violations found:  2

===============================================================================
Object Summary:
===============================================================================

-------------------------------------------------------------------------------
# Section: Unix File System
-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
Rule Name: Tripwire Data Files (/var/lib/tripwire)
Severity Level: 100
-------------------------------------------------------------------------------

Added:
"/var/lib/tripwire/Lepard.twd"

-------------------------------------------------------------------------------
Rule Name: Root config files (/root)
Severity Level: 100
-------------------------------------------------------------------------------

Added:
"/root/test.txt"

===============================================================================
Error Report:
===============================================================================

No Errors

-------------------------------------------------------------------------------
*** End of report ***

Open Source Tripwire 2.4 Portions copyright 2000-2018 Tripwire, Inc.  Tripwire is a registered
trademark of Tripwire, Inc. This software comes with ABSOLUTELY NO WARRANTY;
for details use --version. This is free software which may be redistributed
or modified only under certain conditions; see COPYING for details.
All rights reserved.

100

101

102

# tripwire -m c -s -c /etc/tripwire/tw.cfg

下記のように表示されればOK

Open Source Tripwire(R) 2.4.3.7 Integrity Check Report

Report generated by: root

Report created on: Sun 28 Apr 2024 10:45:00 AM JST

Database last updated on: Never

===============================================================================

Report Summary:

===============================================================================

Host name: Lepard

Host IP address: 192.168.11.83

Host ID: None

Policy file used: /etc/tripwire/tw.pol

Configuration file used: /etc/tripwire/tw.cfg

Database file used: /var/lib/tripwire/Lepard.twd

Command line used: tripwire -m c -s -c /etc/tripwire/tw.cfg

===============================================================================

Rule Summary:

===============================================================================

-------------------------------------------------------------------------------

Section: Unix File System

-------------------------------------------------------------------------------

Rule Name Severity Level Added Removed Modified

--------- -------------- ----- ------- --------

User binaries 66 0 0 0

Tripwire Binaries 100 0 0 0

Libraries 66 0 0 0

Operating System Utilities 100 0 0 0

File System and Disk Administraton Programs

100 0 0 0

Kernel Administration Programs 100 0 0 0

Networking Programs 100 0 0 0

System Administration Programs 100 0 0 0

Hardware and Device Control Programs

100 0 0 0

System Information Programs 100 0 0 0

(/sbin/runlevel)

Application Information Programs

100 0 0 0

(/sbin/rtmon)

Critical Utility Sym-Links 100 0 0 0

Shell Binaries 100 0 0 0

Critical system boot files 100 0 0 0

* Tripwire Data Files 100 1 0 0

System boot changes 100 0 0 0

OS executables and libraries 100 0 0 0

Security Control 100 0 0 0

Critical configuration files 100 0 0 0

* Root config files 100 1 0 0

Invariant Directories 66 0 0 0

Temporary directories 33 0 0 0

Critical devices 100 0 0 0

Total objects scanned: 75585

Total violations found: 2

===============================================================================

Object Summary:

===============================================================================

-------------------------------------------------------------------------------

# Section: Unix File System

-------------------------------------------------------------------------------

Rule Name: Tripwire Data Files (/var/lib/tripwire)

Severity Level: 100

-------------------------------------------------------------------------------

Added:

"/var/lib/tripwire/Lepard.twd"

-------------------------------------------------------------------------------

Rule Name: Root config files (/root)

Severity Level: 100

-------------------------------------------------------------------------------

Added:

"/root/test.txt"

===============================================================================

Error Report:

===============================================================================

No Errors

-------------------------------------------------------------------------------

*** End of report ***

trademark of Tripwire, Inc. This software comes with ABSOLUTELY NO WARRANTY;

for details use --version. This is free software which may be redistributed

or modified only under certain conditions; see COPYING for details.

テスト用ファイルを削除

# rm -f /root/test.txt

1	# rm -f /root/test.txt

⑧Tripwire 定期的にメールで結果報告するスクリプト作成

# cd /var/www/system
# vi tripwire.sh

1 2	# cd /var/www/system # vi tripwire.sh

tripwire.shの内容

#!/bin/bash

PATH=/usr/sbin:/usr/bin:/bin:/usr/local/tripwire/sbin

# パスフレーズ設定
LOCALPASS=xxxxx # ローカルキーパスフレーズ
SITEPASS=xxxxx # サイトキーパスフレーズ

#通知先メールアドレス指定
MAIL="<your mailaddress> "

cd /etc/tripwire

# Tripwireチェック実行
tripwire -m c -s -c tw.cfg|mail -s "Tripwire(R) Integrity Check Report in `hostname`" $MAIL

# ポリシーファイル最新化
twadmin -m p -c tw.cfg -p tw.pol -S site.key > twpol.txt
perl twpolmake.pl twpol.txt > twpol.txt.new
twadmin -m P -c tw.cfg -p tw.pol -S site.key -Q $SITEPASS twpol.txt.new > /dev/null
rm -f twpol.txt* *.bak

# データベース最新化
rm -f /usr/local/tripwire/lib/tripwire/*.twd*
tripwire -m i -s -c tw.cfg -P $LOCALPASS

#!/bin/bash

PATH=/usr/sbin:/usr/bin:/bin:/usr/local/tripwire/sbin

# パスフレーズ設定

LOCALPASS=xxxxx # ローカルキーパスフレーズ

SITEPASS=xxxxx # サイトキーパスフレーズ

#通知先メールアドレス指定

MAIL="<your mailaddress> "

cd /etc/tripwire

# Tripwireチェック実行

tripwire -m c -s -c tw.cfg|mail -s "Tripwire(R) Integrity Check Report in `hostname`" $MAIL

# ポリシーファイル最新化

twadmin -m p -c tw.cfg -p tw.pol -S site.key > twpol.txt

perl twpolmake.pl twpol.txt > twpol.txt.new

twadmin -m P -c tw.cfg -p tw.pol -S site.key -Q $SITEPASS twpol.txt.new > /dev/null

rm -f twpol.txt* *.bak

# データベース最新化

rm -f /usr/local/tripwire/lib/tripwire/*.twd*

tripwire -m i -s -c tw.cfg -P $LOCALPASS

# chmod 700 tripwire.sh

cron に追加
# crontab -e
0 3 * * * /var/www/system/tripwire.sh

# chmod 700 tripwire.sh

cron に追加

# crontab -e

0 3 * * * /var/www/system/tripwire.sh

下記コマンドを実行し、指定したメールアドレスにtripwire実行結果が通知されることを確認

# /var/www/system/tripwire.sh

1	# /var/www/system/tripwire.sh

Logwatch導入

①インストール

# dnf install logwatch

1	# dnf install logwatch

②設定ファイルの編集

# cat /usr/share/logwatch/default.conf/logwatch.conf >> /etc/logwatch/conf/logwatch.conf

# vi /etc/logwatch/conf/logwatch.conf
●76 行目 : 「MailTo = root」の行頭に「#」を挿入し、その下行に通知を受け取りたいメールアドレスを設定
#MailTo = root
MailTo = [メールアドレス]
●115行目あたり : ログ通知の詳細度を設定
#Detail = Low
Detail = High

# cat /usr/share/logwatch/default.conf/logwatch.conf >> /etc/logwatch/conf/logwatch.conf

# vi /etc/logwatch/conf/logwatch.conf

●76 行目 : 「MailTo = root」の行頭に「#」を挿入し、その下行に通知を受け取りたいメールアドレスを設定

#MailTo = root

MailTo = [メールアドレス]

●115行目あたり : ログ通知の詳細度を設定

#Detail = Low

Detail = High

③レポートを出力

# logwatch --output stdout

1	# logwatch --output stdout

下記のようなメッセージが出ます

 ################### Logwatch 7.10 (01/22/24) ####################
        Processing Initiated: Sun Apr 28 11:01:38 2024
        Date Range Processed: today
                              ( 2024-Apr-28 )
                              Period is day.
        Detail Level of Output: 10
        Type of Output/Format: stdout / text
        Logfiles for Host: Lepard
 ##################################################################

 --------------------- Kernel Audit Begin ------------------------

 *** Denials ***
    system_u:system_r:init_t:s0 system_u:object_r:root_t:s0 (rmdir dir): 2 times
    system_u:system_r:systemd_hwdb_t:s0 system_u:system_r:systemd_hwdb_t:s0 (dac_override capability): 1 times

  Number of audit daemon starts: 3

  Number of audit daemon stops: 3

  Number of audit initializations: 3

-----------Omission----------

**Unmatched Entries**
    No hostname configured, using default hostname.: 2 Time(s)
    Reexecuting requested from client PID 2099 ('systemctl') (unit session-5.scope)...: 1 Time(s)
    Relabeled /dev, /dev/shm, /run, /sys/fs/cgroup in 26.739ms.: 1 Time(s)
    Reloading...: 15 Time(s)
    Running in initrd.: 3 Time(s)

 ---------------------- Systemd End -------------------------


 --------------------- Disk Space Begin ------------------------

 Filesystem               Size  Used Avail Use% Mounted on
 /dev/mapper/fedora-root   15G  4.3G   11G  29% /
 /dev/nvme0n1p2           960M  286M  675M  30% /boot


 ---------------------- Disk Space End -------------------------


 ###################### Logwatch End #########################

################### Logwatch 7.10 (01/22/24) ####################

Processing Initiated: Sun Apr 28 11:01:38 2024

Date Range Processed: today

( 2024-Apr-28 )

Period is day.

Detail Level of Output: 10

Type of Output/Format: stdout / text

Logfiles for Host: Lepard

##################################################################

--------------------- Kernel Audit Begin ------------------------

*** Denials ***

system_u:system_r:init_t:s0 system_u:object_r:root_t:s0 (rmdir dir): 2 times

system_u:system_r:systemd_hwdb_t:s0 system_u:system_r:systemd_hwdb_t:s0 (dac_override capability): 1 times

Number of audit daemon starts: 3

Number of audit daemon stops: 3

Number of audit initializations: 3

-----------Omission----------

**Unmatched Entries**

No hostname configured, using default hostname.: 2 Time(s)

Reexecuting requested from client PID 2099 ('systemctl') (unit session-5.scope)...: 1 Time(s)

Relabeled /dev, /dev/shm, /run, /sys/fs/cgroup in 26.739ms.: 1 Time(s)

Reloading...: 15 Time(s)

Running in initrd.: 3 Time(s)

---------------------- Systemd End -------------------------

--------------------- Disk Space Begin ------------------------

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/fedora-root 15G 4.3G 11G 29% /

/dev/nvme0n1p2 960M 286M 675M 30% /boot

---------------------- Disk Space End -------------------------

###################### Logwatch End #########################

④次のコマンドで設定したアドレスにレポートが届くかテストを行います。上記の様なログレポートメールが届いているか確認

# /etc/cron.daily/0logwatch

1	# /etc/cron.daily/0logwatch

DiCEのインストール

ネットが切断されたり、ルーターが切断再起動したときにおこるグローバルIPの変更の度に、ダイナミックDNSにアクセスしグローバルIPが変更されたことを知らせなくてはいけません。その作業を自動的にやってくれるのがDiCEです

①Diceのダウンロード、インストール

# cd /usr/local/bin
# wget http://www.hi-ho.ne.jp/yoshihiro_e/dice/diced01914.tar.gz
# tar -xzvf diced01914.tar.gz

# cd /usr/local/bin

# wget http://www.hi-ho.ne.jp/yoshihiro_e/dice/diced01914.tar.gz

# tar -xzvf diced01914.tar.gz

②DiCEの設定
DiCEの出力文字はEUCのため、文字化けしてしまう。UTF-8に変換するために、nkfをインストールしておく

# dnf install nkf

1	# dnf install nkf

64bitOSで32bitソフトのDiceを動かすため下記をインストール

# dnf install glibc.i686

1	# dnf install glibc.i686

③DiCEを起動する

# cd /usr/local/bin/DiCE
# ./diced | nkf -uw

1 2	# cd /usr/local/bin/DiCE # ./diced \| nkf -uw

④イベントの追加
DNSサービスはVALUEDOMAINとした場合

=-=-=- DiCE DynamicDNS Client -=-=-=
Version 0.19 for Japanese
Copyright(c) 2001 sarad

:add
新しくイベントを追加します

DynamicDNSサービス名を入力してください
"?"で対応しているサービスを一覧表示します
(P)戻る
>VALUEDOMAIN
-------------------------------------------------
<< バリュードメイン >>
URL: http://www.value-domain.com/index.php
*** 情報 ***
・全ホストを更新するにはホスト名に"*"を指定してください。
・"ユーザー名"に入力された内容は無視されます。
=================================================
ドメイン名を入力してください
"?"でドメイン一覧を表示します
(P)戻る
>[Domain name]
=================================================
ホスト名を入力してください
(P)戻る
>[Host name]
=================================================
ログインユーザ名を入力してください
(P)戻る
>[Login username]
=================================================
ログインパスワードを入力してください
(P)戻る
>[Password]
=================================================
登録するIPアドレスを入力してください
空白にすると現在のIPアドレスを自動検出します
(P)戻る
>[Enter]
=================================================
このイベントに題名を付けてください
(P)戻る
>[Any name]
=================================================
このイベントを実行するスケジュールを設定します
-------------------------------------------------
実行する頻度を指定してください (番号入力)
(0)１回のみ (1)１日１回 (2)１週間に１回 (3)１ヵ月に１回
(4)その他の周期 (5)IPアドレス変化時 (6)起動時
(P)戻る
>[Any}
-------------------------------------------------
IPアドレスがあまり変化しない環境の場合、更新せずに一定期間を過ぎると
アカウントを削除されてしまうことがあります
IPアドレスの変化が無い時に実行する間隔を指定してください
(0)7日毎   (1)14日毎  (2)21日毎  (3)28日毎
(4)35日毎  (5)56日毎  (6)84日毎
(P)戻る
>[Any}
=================================================
=================================================
このイベントを有効にしますか? (Y/N)
(イベントの有効/無効は"EN/DIS"コマンドで切替えられます)
>y
=================================================
イベントを保存しますか? (Y/N)
>y
イベント"xxxxx"を保存しました
=================================================
:list
(No.)   (イベント名)                   (スケジュール)             (次回予定)
  0 *  xxxxx                       IPアドレス変化時 (７日毎)   03/12 13:58
:ex o
+ 3/5 13:58 にxxxxxが実行されました
  IPアドレスを更新しました

終了
:exit

=-=-=- DiCE DynamicDNS Client -=-=-=

Version 0.19 for Japanese

:add

新しくイベントを追加します

DynamicDNSサービス名を入力してください

"?"で対応しているサービスを一覧表示します

(P)戻る

>VALUEDOMAIN

-------------------------------------------------

<< バリュードメイン >>

URL: http://www.value-domain.com/index.php

*** 情報 ***

・全ホストを更新するにはホスト名に"*"を指定してください。

・"ユーザー名"に入力された内容は無視されます。

=================================================

ドメイン名を入力してください

"?"でドメイン一覧を表示します

(P)戻る

>[Domain name]

=================================================

ホスト名を入力してください

(P)戻る

>[Host name]

=================================================

ログインユーザ名を入力してください

(P)戻る

>[Login username]

=================================================

ログインパスワードを入力してください

(P)戻る

>[Password]

=================================================

登録するIPアドレスを入力してください

空白にすると現在のIPアドレスを自動検出します

(P)戻る

>[Enter]

=================================================

このイベントに題名を付けてください

(P)戻る

>[Any name]

=================================================

このイベントを実行するスケジュールを設定します

-------------------------------------------------

実行する頻度を指定してください (番号入力)

(0)１回のみ (1)１日１回 (2)１週間に１回 (3)１ヵ月に１回

(4)その他の周期 (5)IPアドレス変化時 (6)起動時

(P)戻る

>[Any}

-------------------------------------------------

IPアドレスがあまり変化しない環境の場合、更新せずに一定期間を過ぎると

アカウントを削除されてしまうことがあります

IPアドレスの変化が無い時に実行する間隔を指定してください

(0)7日毎 (1)14日毎 (2)21日毎 (3)28日毎

(4)35日毎 (5)56日毎 (6)84日毎

(P)戻る

>[Any}

=================================================

このイベントを有効にしますか? (Y/N)

(イベントの有効/無効は"EN/DIS"コマンドで切替えられます)

=================================================

イベントを保存しますか? (Y/N)

イベント"xxxxx"を保存しました

=================================================

:list

(No.) (イベント名) (スケジュール) (次回予定)

0 * xxxxx IPアドレス変化時 (７日毎) 03/12 13:58

:ex o

+ 3/5 13:58 にxxxxxが実行されました

IPアドレスを更新しました

終了

:exit

⑤Diceの自動実行

DiCEを常駐モードで起動

# setarch `uname -m` /usr/local/bin/DiCE/diced -d -l

1	# setarch `uname -m` /usr/local/bin/DiCE/diced -d -l

DiCE自動起動設定

# echo “setarch `uname -m` /usr/local/bin/DiCE/diced -d -l” >> /etc/rc.d/rc.local

1	# echo “setarch `uname -m` /usr/local/bin/DiCE/diced -d -l” >> /etc/rc.d/rc.local

rc.localに実行権限を付加

# chmod u+x /etc/rc.d/rc.local

1	# chmod u+x /etc/rc.d/rc.local

ディスク使用率チェックスクリプト導入

1 スクリプト作成

# cd /var/www/system
# vi disk_capacity_check.sh

1 2	# cd /var/www/system # vi disk_capacity_check.sh

disk_capacity_check.shの内容

#!/bin/bash

#通知先メールアドレス指定
MAIL="<Mail address>"

DVAL=`/bin/df / | /usr/bin/tail -1 | /bin/sed 's/^.* \([0-9]*\)%.*$/\1/'`

if [ $DVAL -gt 80 ]; then
echo "Disk usage alert: $DVAL %" | mail -s "Disk Space Alert in `hostname`" $MAIL
fi

#!/bin/bash

#通知先メールアドレス指定

MAIL="<Mail address>"

DVAL=`/bin/df / | /usr/bin/tail -1 | /bin/sed 's/^.* $[0-9]*$%.*$/\1/'`

if [ $DVAL -gt 80 ]; then

echo "Disk usage alert: $DVAL %" | mail -s "Disk Space Alert in `hostname`" $MAIL

実行権限

# chmod 700 disk_capacity_check.sh

1	# chmod 700 disk_capacity_check.sh

2 実行確認

①現在の使用率を確認

# df -h

# df -h

次のように表示される

Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/fedora-root   15G  5.4G  9.6G  36% /
devtmpfs                 4.0M     0  4.0M   0% /dev
tmpfs                    1.9G     0  1.9G   0% /dev/shm
efivarfs                 256K   55K  197K  22% /sys/firmware/efi/efivars
tmpfs                    775M  1.6M  774M   1% /run
/dev/loop1                39M   39M     0 100% /var/lib/snapd/snap/snapd/21465
/dev/loop0                46M   46M     0 100% /var/lib/snapd/snap/certbot/3700
/dev/loop2                64M   64M     0 100% /var/lib/snapd/snap/core20/2264
tmpfs                    1.9G     0  1.9G   0% /tmp
/dev/nvme0n1p2           960M  339M  622M  36% /boot
/dev/nvme0n1p1           599M  7.5M  592M   2% /boot/efi
tmpfs                    388M  8.0K  388M   1% /run/user/1000

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/fedora-root 15G 5.4G 9.6G 36% /

devtmpfs 4.0M 0 4.0M 0% /dev

tmpfs 1.9G 0 1.9G 0% /dev/shm

efivarfs 256K 55K 197K 22% /sys/firmware/efi/efivars

tmpfs 775M 1.6M 774M 1% /run

/dev/loop1 39M 39M 0 100% /var/lib/snapd/snap/snapd/21465

/dev/loop0 46M 46M 0 100% /var/lib/snapd/snap/certbot/3700

/dev/loop2 64M 64M 0 100% /var/lib/snapd/snap/core20/2264

tmpfs 1.9G 0 1.9G 0% /tmp

/dev/nvme0n1p2 960M 339M 622M 36% /boot

/dev/nvme0n1p1 599M 7.5M 592M 2% /boot/efi

tmpfs 388M 8.0K 388M 1% /run/user/1000

②使用率80%以上になるようダミーファイルを作成(例ではdummyfile という名前で8G程度)

# dd if=/dev/zero of=dummyfile bs=1M count=8000

1	# dd if=/dev/zero of=dummyfile bs=1M count=8000

➂ディスク容量チェックスクリプトを実行

# /var/www/system/disk_capacity_check.sh

1	# /var/www/system/disk_capacity_check.sh

設定したメールアドレスに本文の内容として「Disk usage alert: 89 %」のように記載のメールが届きます

④作成した「dummyfile」を削除

# rm dummyfile

1	# rm dummyfile

⑤定期実行設定

# crontab -e
30 2 * * * /var/www/system/disk_capacity_check.sh

1 2	# crontab -e 30 2 * * * /var/www/system/disk_capacity_check.sh

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