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Fedora37 ; Chkrootkit , Logwatch , Disk Usage Check Script


①Download , Install

➁Create /root/bin directory and move chkrootkit command to that directory

➂Check chkrootkit.

Checking `chsh'… INFECTED
If the above display appears, it is probably a false positive.

④Create chkrootkit periodic execution script and change permissions
Create chkrootkit execution script in a directory where it is automatically executed daily

Scheduled Script Contents

Add execution permission to chkrootkit execution script

⑥Backup commands used by chkrootkit
If the commands used by chkrootkit are tampered with, rootkit will not be detected.
Back up these commands.
If necessary, run chkrootkit with the backed up command

⑦Run chkrootkit on the copied command
If nothing is displayed, no problem.

⑧Compresses backed up commands

⑨Download and save chkrootkit_cmd.tar.gz file to Windows

⑪Delete commands on the backed up server



②Edit configuration file

③Output Logwatch reports

It will appear as follows

④Test to see if the report arrives at the address you set. Check if you receive a log report email like the one above.

Introduce disk usage check script

1 Script Creation

Contents of

2 Execution Confirmation

①Check current usage rates

It appears as follows

②Create a dummy file to achieve at least 80% utilization

➂Run check scripts

You will receive an email to the email address you have set up, stating something like "Disk usage alert: 88 %".

④Delete "dummyfile"

⑤Periodic Execution Setting