Boost Your Productivity with 15 Essential Linux Command‑Line Tricks

Command line editing

Use Ctrl+A to move the cursor to the beginning of the line and Ctrl+E to move it to the end. The quick‑substitution syntax ^old^new^ replaces the first occurrence of old with new in the previous command and then executes the modified command.

$ eho hello world
Command 'eho' not found, did you mean:
  command 'echo' from package coreutils
  command 'who' from package coreutils
Try: sudo apt install <em>package-name</em>
$ ^e^ec^
echo hello world
hello world

Alias for remote login

Create a Bash alias that contains the full ssh command, user name and host IP. Add the alias to ~/.bashrc (or another startup file) so it persists across sessions. Example: alias butterfly='ssh -v -l jdoe 192.168.0.11' List current aliases with alias. To replace raw IP addresses with readable hostnames, add entries to /etc/hosts or configure DNS.

Freeze / thaw terminal output

Press Ctrl+S (XOFF) to pause scrolling output; resume with Ctrl+Q (XON). This is useful when a command produces a flood of data.

Reusing commands from history

The shell keeps a numbered history. Use the exclamation syntax to replay commands:

!!          # repeat the immediately previous command
!ec         # repeat the most recent command that starts with "ec"
!76         # repeat command number 76 from the history list

You can also view the history with history or navigate with the up/down arrow keys.

Dynamic log monitoring

Continuously display new lines appended to a log file with tail -f /var/log/syslog. Replace the path with any file you need to monitor.

Getting quick help

Most commands provide a concise usage summary via the --help option, e.g. ls --help. This is a lightweight alternative to opening the full manual with man.

Safe deletion with rm

Alias rm to rm -i so the shell prompts for confirmation before each removal:

alias rm='rm -i'

Temporarily disabling an alias

Use unalias to remove an alias for the current shell session: unalias rm Place the unalias command in a startup script if you need the alias disabled only for specific sessions.

Convenient sudo usage

Run the previous command with super‑user privileges by typing sudo !!. You can also create aliases that already include sudo, for example:

alias update='sudo apt update'

Shell functions for more complex tasks

Define a function in ~/.bashrc to combine multiple steps. The following function creates a directory (including parents) and immediately changes into it:

md () {
    mkdir -p "$1" && cd "$1"
}

After adding the function, reload the configuration with source ~/.bashrc or start a new shell. Then md project creates the project directory and changes into it.