Set the execution time for Linux to view historical commands

When you set Linux to view the execution time of historical commands, we all know that on the Linux platform, you can use the history command to view the commands that have been recently executed. However, the history command displays only numbers and commands by default, I only know that the command is recently executed, but I do not know the specific execution date, time... when you set Linux to view the execution time of historical commands, we all know that on the Linux platform, you can use the history command to view the commands that have been recently executed. However, the history command displays only numbers and commands by default, I only know that the command was executed recently, but I do not know the specific execution date, time, minute, and second. sometimes it is inconvenient to find evidence, for example: 352 exit 353 history 354 vi/etc/profile 355 history The following describes how to make the history command display the specific execution time of the recently executed command. the steps are as follows: 1. edit the/etc/profile file as the ROOT user and add the following content to it (I usually add it at the end): export HISTTIMEFORMAT = "% Y-% m-% d % H: % M: % S" note: add a space between the "quotation marks" and "S" at the end, separate the datetime and history commands with spaces. 2. log out of the system and log on again. note: the historical commands executed before step 1 are displayed as the execution time of step 2 after you log on again, the following command will display the correct actual execution time. 3. view the result (it will take effect for any user): (1) try the result with the ROOT user: [root @ oraclelinux ~] # History 354 23:50:00 vi/etc/profile 355 23:50:12 history 356 23:50:14 exit 357 00:04:32 history [root @ oraclelinux ~] # (2) Try it out for ORACLE users: [root @ oraclelinux ~] # Su-oracle [oracle @ oraclelinux ~] $ History 321 00:06:33 history 322 00:07:05 exit 323 00:19:23 history