Essential Linux Commands for Self-Hosting Beginners

Self-hosting runs on Linux, and Linux runs on commands. But you do not need to know hundreds of them. Twelve commands cover the vast majority of server management tasks. If you learn these, you can handle basic server administration without calling for help.

Navigating the Filesystem

pwd — Print Working Directory

Shows you where you are. Always run this first if you are unsure of your location in the filesystem.

pwd
# Output: /opt/stacks

ls — List Directory Contents

Shows what is in a directory. The most commonly used options are:

ls          # list files and directories
ls -l       # long format: permissions, size, date, name
ls -la      # long format, including hidden files (starting with .)
ls -lh      # long format with human-readable file sizes (K, M, G)
ls -ltr     # long format, sorted by time, newest last

The long format shows permissions, owner, group, size, modification date, and name. This is the output you will use most often to check that files are where they should be and have the correct permissions.

cd — Change Directory

cd /opt/stacks        # go to a specific directory
cd ..                 # go up one level
cd ~                  # go to your home directory
cd -                  # go back to the previous directory

Working with Files and Directories

mkdir — Make Directory

mkdir new-project            # create a new directory
mkdir -p /opt/stacks/app     # create parent directories as needed

cp — Copy Files and Directories

cp file.txt backup.txt             # copy a file
cp -r /opt/stacks/app /backups/    # copy a directory recursively

mv — Move or Rename Files

mv old-name.txt new-name.txt       # rename a file
mv file.txt /opt/stacks/           # move a file to another directory

rm — Remove Files or Directories

rm file.txt              # delete a file
rm -r old-project/       # delete a directory and its contents (be careful)
rm -rf old-project/      # force delete without prompts (very careful)

Warning: rm is permanent. There is no trash bin on the command line. Always double-check before running rm, especially with -rf.

Viewing File Contents

cat — Concatenate and Write Files

cat docker-compose.yml       # display a file's contents in the terminal
cat file1.txt file2.txt      # display multiple files sequentially

head and tail — View the Beginning or End of a File

head -20 app.log       # first 20 lines of a log file
tail -20 app.log       # last 20 lines of a log file
tail -f app.log        # follow a log file in real time (Ctrl+C to stop)

tail -f is the most useful command for debugging. Run it while starting a Docker container to see live logs as the application initialises.

File Permissions

chmod — Change File Mode (Permissions)

chmod 600 private.key      # owner can read/write, no one else
chmod 755 script.sh         # owner can read/write/execute, others can read/execute
chmod -R 755 public/        # apply recursively to a directory

Permission numbers: 4 = read, 2 = write, 1 = execute. Add them: 7 = read+write+execute, 6 = read+write, 5 = read+execute.

chown — Change File Owner

chown user:group file.txt           # set owner and group
chown -R 1000:1000 /opt/stacks/     # set owner by numeric ID (common for Docker)

Disk and System

df — Report File System Disk Space Usage

df -h     # human-readable: shows free and used space on all mounted filesystems

Run this when you need to know if a disk is filling up. Check before deploying large applications.

du — Estimate File Space Usage

du -sh /opt/stacks/       # total size of a directory
du -sh *                  # size of each subdirectory in the current directory

If the command line is not your preferred interface, VPS1 manages your server for you. We handle the file permissions, the disk monitoring, and every command in this guide. You focus on your business.