Linux Commands as SU

1. Execute commands with superuser privileges 

sudo / su - / su -i

2. Add a new user account.

adduser username

3. Modify an existing user account.

    usermod <options> <username>

4. Set or reset a user’s password.

passwd <username>

5. Remove a user account.

deluser <username>

6. List groups a user belongs to.

groups <username>

7. Change file or directory permissions.

 chmod u + r/w/x

8. Change file or directory ownership.

 chown username file.txt/directory_name

9. Check disk usage of files/directories

du -h

10. Show available disk space on filesystems

df -h 

11. Mount or unmount filesystems

mount/umount

12. View queued and running jobs

squeue -u username

13. View jobs on a specific partition

    squeue -p <partition>

14. Detailed info on a job

scontrol show job jobid

15. View historical job accounting

   sacct -j jobid

16. Node and partition status

sinfo / sinfo -Nl

17. Detailed node info

scontrol show node <NODE>

18. Scheduling diagnostic tool for Slurm

sdiag

19. CPU, memory, process monitoring

htop/top

20. Memory usage overview

free -h

21. Report virtual memory statistics

vmstat

22. Reboot/Halt the System

sudo init 6/0

23. Broadcasting Messages to All HPC Users

sudo wall "HPC maintenance will start in 10 minutes. Please save your work."

write username (for target user)