Linux

Cheat Sheet

1. find . -name thisfile.txt

If you need to know how to find a file in Linux called thisfile.txt, it will look for it in current and sub-directories.

2. find /home -name *.jpg

Look for all .jpg files in the /home and directories below it.

3. find . -type f -empty

Look for an empty file inside the current directory.

4. find /home -user randomperson-mtime 6 -iname ".db"

Look for all .db files (ignoring text case) that have been changed in the preceding 6 days by a user called randomperson.

export PS1="\$ "

lsof -i :8000

Command displays the last 100 lines of the log.

tail -n 100 some_log.log

lsb_release -a

hostnamectl

cat /etc/*release

Filesystem disk space usage

df -h

Information about block devices, including disks and partitions

lsblk

systemctl list-units --type=service

systemctl list-units --type=service --state=running

systemctl list-unit-files --type=service --state=enabled

systemctl status <service-name>

sudo adduser <username>

To give the new user administrative privileges (allowing them to use sudo)

sudo usermod -aG sudo <username>

su - <username>