cloud engineer
by Ulysses
Lastlog displays the latest login information of all users in the system. You can’t view the lastlog file since it’s not an ascii file. You’ll need to run the actual command to view what’s in it. The program will spit out a list that may be longer than your terminal buffer. In that case, it’s best to pipe the output to “more” or better yet, use the “grep” command to isolate the user.
lastlog | more lastlog | grep johndoe |
lastlog | more lastlog | grep johndoe
by Ulysses
You can check when the system was last patch using the following.
# check RPM when the last updates were ran. rpm -qa --last | grep kernel # this is a bit of a stretch, but typically a reboot is performed after an upgrade. uptime |
# check RPM when the last updates were ran. rpm -qa --last | grep kernel # this is a bit of a stretch, but typically a reboot is performed after an upgrade. uptime
by Ulysses
Here’s a command to scan for any errors, warnings and panics on the system. If the file is too large, pipe it to more.
sudo grep -E -i -r 'error|warning|panic' /var/log sudo grep -E -i -r 'error|warning|panic' /var/log >error-warning-panic.log cat error-warning-panic.log | more |
sudo grep -E -i -r 'error|warning|panic' /var/log sudo grep -E -i -r 'error|warning|panic' /var/log >error-warning-panic.log cat error-warning-panic.log | more