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