94 lines
1.6 KiB
Markdown
94 lines
1.6 KiB
Markdown
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# Processes
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Process id 1 is systemd. All other processes are child processes.
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> ps -sH
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This has every process on the system, and -H shows the hierarchy. This can be piped to less to view easily.
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> ps -u ghost
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Looking at processes spawned from user 'ghost'.
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> ps -e --forest
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Like tree, but more.
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> ps -sfH
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The fucking lot.
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All of this is from /proc, which is a direct line to the kernel. Commands like `free', `top' et c. pulls from /proc.
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# Top
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In `top' we can take the pid and then press `k' in order to kill that process.
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# check what's going on with qutebrowser
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> ps aux | grep qutebrowser
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# Check open ports
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sudo netstat -tulpn
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#Check that udev process
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systemctl status udev
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# Show net interface
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> ip addr show
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This can also take arguments, such as the name of an interface.
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# Find
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> find . -name 'bob cv'
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Find file 'bob cv'
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> find . -size +7G
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Find files of 7Gig or more.
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> find -name *hidden* -type l
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Find a symbolic link containing 'hidden' in the name.
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> find -name *txt -delete
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Delete all files from here of the *txt type.
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> find -type d -empty
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Find empty directories.
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> find . mtime 50
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Find all file modified precisely 50 days ago. There's also:
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* -mtime +20
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* file modified more than 20 days ago.
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* -atime -13
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* file *accessed* less than 13 days ago.
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* -cmin 20
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* file *modified* 20 minutes ago.
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* -mmin +70
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* files modified more than 70 minutes ago.
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# Logs
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> cat /var/logs/auth.log | grep fail
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# Files
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> file example.txt
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This shows info about a file.
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# Further reading
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[Hund](https://hund0b1.gitlab.io/2019/02/11/a-collection-of-handy-ways-of-manipulating-text-in-bash.html) has some fantastic examples.
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