USEFUL LINUX COMMANDS

Command	Description
hostnamectl	Check the Linux version (e.g., on CentOS).
du -h	View the overall Disk Usage in human-readable format.
du -sh *	View the size of directories and files in the current directory.
du -chs	View the total size of a specified folder or file.
df -h	Shows the remaining disk space and disk usage across all mounted filesystems.
ls	List the contents of the current directory (the "list view").
ls -l	View the long list format of the directory contents, showing permissions, owner, size, and date.
ls -lh	View the long list format with sizes displayed in Human Readable units (e.g., GB, MB).
sudo -i	Elevate user privileges to the root user with a full environment.
sudo du -h --max-depth=1 -x	View what is taking up space in the server's current directory, limited to one level deep.
top	Shows the memory and CPU operations currently running (processes, memory usage).
free -mh	Shows the memory in use and free in a human-readable format (MB, GB).
rm -rf dirname	Remove a directory and all its contents without prompting for confirmation (-r for recursive, -f for force).
rm -f filename.extension	Force delete a file without prompting for confirmation.
sudo passwd root	Create or change the password for the root user.
sudo systemctl status ssh	Check the Status of the SSH service.
lsb_release -a	Displays LSB (Linux Standard Base) and distribution-specific information (useful for checking distro name and version).