Name your files with dates etc.
The command to append a date to a file name is the 'date' command.
●How to use the date command
| $ date 2020 Septembe 23 Wednesday 00:11:21 JST ---------------------------------------------------------- The date is now displayed. Now run it as follows ---------------------------------------------------------- $ date +%Y%m%d 20200923 ---------------------------------------------------------- |
●Save the file with the date in the name
| [root@Lion ~]# touch test.txt ←Create a "test.txt" file with the touch command [root@Lion ~]# ls -l -rw-rw-r-- 1 koro koro0 09 23 09:16 test.txt [root@Lion ~]# mv test.txt test.txt_`date +%Y%m%d` ←Run the date command [root@Lion ~]# ls -l test.txt* -rw-rw-r-- 1 koro koro0 09 23 09:16 test.txt_20200923 |
If you execute mv or cp command with `date +%Y%m%d` after or before the file name, you can save the file with the date.
Variables enclosed in `date +%Y%m%d` with "`" will be executed as a command. The same is true if the variable is enclosed in $() instead of "`".
| [root@Lion ~]# touch test.txt_$(date +%Y%m%d) [root@Lion ~]# ls -l test.txt* -rw-rw-r-- 1 koro koro0 09 23 09:16 test.txt_20200923 |
"%Y%m%d" will name the file with the date, but you can also name it with minutes and seconds
| %Y | Year（4 digit notation） |
| %y | Year（2 digit notation) |
| %m | Month（01～12） |
| %d | Day（01～31） |
| %H | Hours（00～23） |
| %I | Minutes（00～12） |
| %M | Minutes（00～59） |
| %S | Seconds（00～59） |
| %a | Day of the week（Sun～Sat） |
| %b | Month name（Jan～Dec） |