touch - Create a new empty file.
touch filename.txt
chmod - change file permissions.
Full permissions example: chmod 777 filename.txt
find - find files
https://www.linode.com/docs/tools-reference/tools/find-files-in-linux-using-the-command-line/
Ex: find /home -name *.jpg Find all .jpg files in the /home and sub-directories.
dhclient - request a new IP address from DHCP
https://www.cyberciti.biz/faq/howto-linux-renew-dhcp-client-ip-address/
Renew IP address example: sudo dhclient -r
ls - List files
https://techyaz.com/linux/11-examples-ls-command-list-files-linux/
List all files: ls *
List all PDF files: ls *.pdf
List all files wide foramt: ls -l
cp - Copy files and directories
https://www.rapidtables.com/code/linux/cp.html
Copy file from one path to another: cp /dir1/file.txt /dir2/file.txt
mkdir - Make directory
https://www.computerhope.com/unix/umkdir.htm
Ex: mkdir /demo
rmdir - Remove directory
https://www.computerhope.com/unix/urmdir.htm
ex: rmdir /dirname
ifconfig - Check IP addresses
https://www.journaldev.com/30052/linux-ifconfig-command-examples
Ex: ifconfig
ip - Newer Replacement for ifconfig - Check IP addresses
Ex: ip address (list ip addresses)
systemctl - Linux Services
List all services active or not:
systemctl list-units --all --type=service --no-pager
https://www.journaldev.com/24613/linux-ps-command
crontab
awk
grep
sudo
cp
export
nohup
alias
zip
unzip