Command List
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Below is a short list of commands that can be used on a system running Linux.
A series of short and very easy to follow videos covering the basics of Linux are available in Kaltura (login with your UGA MyID and password) at https://kaltura.uga.edu/channel/GACRC/176125031
General Linux Commands
Moving around in the file system
Command | Action |
---|---|
pwd | "Print working directory" - show what directory you are in. |
ls | List the contents (files and subdirectories) of a directory. |
ls -l | List the contents of a dir and show additional info of the files. |
ls -a | List all files, including hidden files, which typically start with a dot. |
ls -lh | List the contents of a dir and show additional info of the files (the files sizes are given in easy to read units). |
ls -lt | List the contents of a dir in cronological order with most recent files on top and show additional info of the files. |
cd dirname | Change to the dirname directory. |
cd .. | Go to the top level of your home directory. |
Examining files
Command | Action |
---|---|
file filename | Determine the type of a file. |
cat filename | Concatenate a file. |
less filename | View text files and paginate them if needed. |
more filename | View text files, one page at a time. |
Manipulating files and directories
Command | Action |
---|---|
cp filename dirname | Copy a file into a directory. |
cp filename1 filename2 | Copy a file into another. |
cp -i filename dirname | Copy a file into a directory and ask before overwriting. |
cp -i filename1 filename2 | Copy a file into another and ask before overwriting. |
cp -r dir1 dir2 | Copy a directory with its contents. |
mv filename dirname | Move a file into a directory. |
mv filename1 filename2 | Renames a file. |
mv -i filename dirname | Move a file and ask before overwriting. |
mv -i filename1 filename2 | Rename a file and ask before overwriting. |
rm filename | Remove a file. |
rm -r dirname | Remove a directory with its contents. |
rm -i filename | Ask before removing a file. |
rm -i -r dirname | Ask before removing a directory and its contents. |
mkdir dirname | Make a directory. |
rmdir dirname | Remove an empty directory. |
Converting files to Linux format
Command | Action |
---|---|
dos2unix filename | Removes DOS/Windows line endings in file. |
mac2unix filename | Removes Mac line endings in file. |
Slurm commands
Command | Action |
---|---|
sbatch | Submit a job to the queue |
scancel | Cancel a queued or running job |
squeue | Check the status of queued and running jobs |
squeue --me | List all jobs for the user running the command |
sinfo | List all nodes and their state |
scontrol show job jobid | Shows information about pending or running jobs, until very shortly after a job finishes |
sacct -X -j jobid | Shows status/information about a job |
sacct-gacrc -X -j jobid | sacct with some useful pre-formatted fields
|
sacct-gacrc-v jobid | sacct-gacrc displayed vertically, line by line
|
Text Editors
Sapelo2 and the teaching cluster have the following text editors available: vi, vim, emacs, nano.