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Learning Bash Command Line: Checklist

Level 1: Beginner

1.1 Navigate directories

  • Check the current working directory with pwd
  • List contents of the current directory with ls -la
  • Change the current directory both up and down with cd
  • Explain the difference between a relative and absolute path
  • Type faster with the shortcuts [TAB] and [UPARROW]

1.2 Inspect text files

  • List the contents of a file with cat, less or more
  • Search words inside text files with grep
  • Display differences between text files with diff
  • Edit a text file with nano or vi/vim

1.3 Copy and move files

  • Copy one or many files with cp
  • Rename or move a file or directory with mv
  • Remove a file with rm
  • Remove a directory with rmdir

Level 2: Intermediate

2.1 Permissions

  • Change permissions on a file with chmod
  • Explain the meaning of the 9 permissions bits on a file
  • Change ownership of a file with chown or chgrp
  • Override user privileges with sudo

2.2 Pipes

  • Redirect output of a program to a text file
  • Redirect output of a program to another program
  • filter, sort, dedup and count lines/words within a pipeline
  • Separate the stdout and stderr streams

2.3 Networking

  • Log into a remote system with ssh
  • Copy files to/from a remote system with scp
  • Download a file from the web with curl or wget

2.4 System checks

  • Check disk usage with df
  • Check directory sizes with du
  • List running processes with pwd or top
  • Kill a process with kill or xkill

2.5 System administration

  • Set an environment variable with export
  • Set an environment variable permanently in your .bashrc file
  • Execute a bash script with source
  • Install a program with apt (Debian/Ubuntu) or yum (RedHat)
  • Compile a program using make
  • Install Linux on your laptop
  • Explain what directories like /bin, /usr, /etc and /boot contain
  • Add multiple users and groups

Level 3: Advanced

3.1 Administration

  • Start a cronjob
  • Configure a service in the /env directory
  • Know the differences between Linux distributions
  • Compile a package from scratch
  • Load kernel modules or compile a Linux kernel

3.2 Networking

  • Run tools to analyze network traffic
  • Configure a local network
  • Install Linux on multiple remote machines simultaneously

3.3. Scripting

  • Write an installer script for a remote machine
  • Write bash scripts that contain variables, loops and conditional statements
  • Process system logs automatically
  • Enumerate more than 50 bash commands