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Logging sudo commands
Each successful authentication using the [command]`sudo` command is logged to the [filename]`/var/log/messages` file. For each authentication, the [filename]`/var/log/secure` file lists the user name and the command that was executed.
For additional logging, use the `pam_tty_audit` module to enable TTY auditing for specific users. TTY auditing prints the file name of the terminal connected to the standard I/O. To enable TTY auditing, add the following line to your [filename]`/etc/pam.d/system-auth` file:
session required pam_tty_audit.so disable=pattern enable=_PATTERN_
Replace `_PATTERN_` with a comma-separated list of users (and globs, if needed).
For example, the following command enables TTY auditing for the root user and disables it for all other users:
session required pam_tty_audit.so disable=* enable=root
Using the `pam_tty_audit` PAM module for auditing only records TTY input. As a result, when the audited user logs in, `pam_tty_audit` records the user’s exact keystrokes and saves them in [filename]`/var/log/audit/audit.log`. For more information, see the *pam_tty_audit(8)* manual page.