Commands using uniq (255)

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journalctl -f
a tail -f variant of systemd journal. Follow the most recent updates or if events are appended to the journal

generate iso

Remove invalid key from the known_hosts file for the IP address of a host
Quick shortcut if you know the hostname and want to save yourself one step for looking up the IP address separately.

Top 10 Memory Consuming Processes

Check the age of the filesystem
Very useful set of commands to know when your file system was created.

Remove all the files except abc in the directory
This is for zsh with extended globbing.

How many files in the current directory ?
A simple "ls" lists files *and* directories. So we need to "find" the files (type 'f') only. As "find" is recursive by default we must restrict it to the current directory by adding a maximum depth of "1". If you should be using the "zsh" then you can use the dot (.) as a globbing qualifier to denote plain files: zsh> ls *(.) | wc -l for more info see the zsh's manual on expansion and substitution - "man zshexpn".

Force logout after 24 hours idle
Shell timeout variables (TMOUT) can be very liberal about what is classified as 'activity', like having an editor open. This command string will terminate the login shell for an user with more than a day's idle time.

Delete a file/directory walking subdirectories (bash4 or zsh)

Find and delete thunderbird's msf files to make your profile work quickly again.


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