# Linux Command Intro Catatan ini ditujukan untuk mempermudah pencarian perintah-perintah dasar Linux untuk keperluan Pentesting/VA.Cheatsheet ini disadur dari akun Github rekan saya[ Satrya Mahardhika](https://github.com/mahaardhiika/VAPT-Training/). ## whoami Print active User ID ```bash whoami ``` ## pwd Print Working directory ```bash pwd ``` ## mkdir Make Directory ```bash mkdir pentest/ ``` ## cd Change directory ```bash cd pentest // Change directory to pentest (Inside Working Directory) cd /var // change directory to var (Outside Working Directory) cd //Back to home Directory cd .. // Directory Up ``` ## ls List files in working Directory ```bash ls ls -la // Print out all files including hidden files ``` ## which Locate executable file full path ```bash which nmap // Locate the full path of nmap ``` ## man Manual Page of a Command ```bash man which // Manual page of which Command man -K "change password" // Search for command to change password ``` ## locate Find / Search for files ```bash locate -i passwd // Find for passwd files with case-Insensitive ``` ## wget Download a file ```bash wget http://:/access_log.txt ``` ## cat Concatenate / print contents of a files ```bash cat access_log.txt ``` ## head Cat only first 10 lines of a file ```bash head access_log.txt ``` ## tail Cat only last 10 lines of a file ```bash less access_log.txt ``` ## cp Copy file ```bash cp access_log.txt access_log.txt.backup ``` ## mv Rename or cut a file ```bash mv access_log.txt exercise.txt ``` ## grep Search for specific word in a file ```bash grep admin exercise.txt ``` ## wc Count lines, words, bytes, of a files ```bash wc exercise.txt ``` ## sort Sort files ```bash sort -u exercise.txt // Sort unique lines on exercise.txt ``` ## tab completion Automatically fill the command/files names we write ```bash cat ex // will show exercise.txt ``` ## history Check history of command we input ```bash history ``` ## sudo Super User do! ```bash cat /etc/shadow // It will prompt Access Denied ls -la /etc/shadow // Check permission of /etc/shadow file whoami sudo -l // Check our sudo privilege sudo /etc/shadow cat /etc/shadow sudo !! // Sudo above command ``` ## su switch user ```bash su kali // Switch to kali sudo su // Switch to root ``` ## Piping & Redirection Piping ( | ) is a command that let you use two or more commands such that output of one command serves as input to the next command. ```bash cat exercise.txt // Will show all lines of exercises.txt cat exercise.txt | grep admin // will only show line contain admin cat exercise.txt | grep admin | wc -c // Count bytes of above output ``` Redirection is change the output of command to a files ```bash cat exercise.txt | grep admin > admin_exercise.txt echo "This will overwrite" > admin_exercise.txt | Overwrite exercise.txt with "This will overwrite", or make exercise.txt file if it is not exists echo "This will not overwrite" >> admin_exercise.txt | write "This will not overwrite" to the last line of exercise.txt ``` ## cut Cutting out some section of a file ```bash cat user.txt | cut -d ":" -f 1 //Menampilkan hanya colomn 1 ``` ## awk More powerful than Cut ```bash cat user.txt | awk -F ":" '{print $1 $2}' cut user.txt | awk -F ":" '{print "Terdapat user bernama " $1}' ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://notes.anggipradana.com/tutorial/linux-command-intro.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.