Linux Tips And Tricks To Improve Your Workflow

A blog post covering some commands and aliases to help make your life easier.
Tl;dr at the bottom for a quick reference.

Shortcut Keys

Command shortcuts

Cycle through the last arguments of previous commands - ALT + .

Argument Cycling

Run the last command again - !!

Running Again

Run the last command with sudo - sudo !!

Run Again With Sudo

Going back and forth

Go back where you came from
cd - : go to previous working directory

Go to home directory
cd : takes you home

Directory Switching

Moving around

Instead of holding down on arrow keys, make use of the following:

CTRL + arrow left or right to move around words
CTRL + a : move to start of the command
CTRL + e : move to the end of the command
ALT + backspace from the last character of a word to remove it
CTRL + delete from first char of a word to delete it

Moving Around

Looking up faster

CTRL + r : recursively search the history

Recursive Search

Once you found the command, you can either press Enter to execute the command. But let’s say you don’t want to execute it as is and want to add some arguments to that command. You can press Tab to put it on your screen to work with.

Working On Previous Command

Clearing the screen

CTRL + l : clear the screen

Aliases

System alias

Sudo alias is required to be able to use sudo functionality with aliases.

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alias sudo = "sudo "

Example is covered in the python server section

Directories

Automatically make parent directories if need be

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alias mkdir='mkdir -p'

Creating Parent Child Directories

Make multiple child directories.

Creating Multiple Child Directories

View Files

View all files with human readable file sizes.

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alias ll='ls -alh'

Launching VPNs

Launching HTB VPN with a single command

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alias htblab='sudo openvpn ~/Documents/noobsecdotnet.ovpn'

Connection Initiated

Connection Established

If you’re working with similar lab or a course like offsecs’ PWK, you could make an alias like that. Also you can launch the lab from anywhere, with a single command which is nice.

Below are the aliases I used in my PWK lab for connection purposes:

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alias pwklab='sudo openvpn ~/Documents/pwk/pwk.ovpn'
alias rdpwin='rdesktop -g 75% -u OS-noob -p supersecurepassword 10.10.10.10'

Get IPs

Lists only IPs of all the active connections.

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alias myip="echo;ip -c a | grep -w 'inet' | cut -d'/' -f1;echo"

IP List

If you don’t like just printing out the IPs and want their respective interfaces as well, you could use the following:

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alias myip="echo;ip -c --brief addr | awk '{print \"\t\" \$1,\"\t\",\$3}';echo"

IP List w/ Interfaces

Python Server

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alias pysrv="python3 -m http.server"

By default the server would start on port 8000

Python Default Server

Arguments can be appended as normal, if port requires sudo, command can be executed with sudo as well (this is where the sudo alias comes in handy)

Python Server On Port 80

SMB Server

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alias smbsrv="sudo impacket-smbserver"

SMB Default Server

Exports

Exports can work as your constant variables, if there are certain wordlists that you often use, typing out the entire path of the wordlist can get cumbersome, this is where exports can give you a hand.

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export WORD1="/usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt"

To utilize the export you just created, you’ll use it as any other bash variable. Let’s take an example of gobuster:

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gobuster dir -u http://10.10.10.13 -w $WORD1

Similarly more exports can be set up to help improve your workflow.

TL;DR

List of all the commands:

Command Function
ALT + . Cycle through the last argument
!! Execute previous command
sudo !! Execute previous command with sudo
cd - Go to the previous working directory
cd Go to home
CTRL + left/right arrow Move left or right between words
CTRL + a Move to the start of the command
CTRL + e Move to the end of the command
CTRL + DEL Delete words
ALT + Backspace Remove words
CTRL + r Search history recursively
CTRL + l Clear screen

Aliases :

Alias Function
alias sudo='sudo ' To be able to use sudo with aliases
alias mkdir='mkdir -p' Make parent-child directories
alias ll='ls -lah' List all files with human readable sizes
alias htblab='sudo openvpn ~/Documents/noobsecdotnet.ovpn' Launch HTB VPN
alias pwklab='sudo openvpn ~/Documents/pwk/pwk.ovpn' Launch PWK VPN
alias rdpwin='rdesktop -g 75% -u OS-noob -p supersecurepassword 10.10.10.10' Launch test Windows machine
alias myip="echo;ip -c a | grep -w 'inet' | cut -d'/' -f1;echo" List of IPs
alias myip="echo;ip -c --brief addr | awk '{print \"\t\" \$1,\"\t\",\$3}';echo" List of IPs with their interfaces
alias pysrv="python3 -m http.server" Launch python server
alias smbsrv="sudo impacket-smbserver" Launch SMB server

Exports :

Exports Function
export WORD1="/usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt" Accessing wordlists easily