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Preparing for MNC interviews? Here’s a Linux commands cheatsheet with the most commonly asked commands in top tech companies. This will help you revise quickly and stay interview-ready!
Basic Linux Commands:
1. File Operations:
– `ls` – List directory contents.
– `cp` – Copy files and directories.
– `mv` – Move or rename files.
– `rm` – Remove files or directories.
– `touch` – Create an empty file.
– `cat` – Display file contents.
– `more` or `less` – View file contents page by page.
2. Directory Operations:
– `cd` – Change directory.
– `pwd` – Print working directory.
– `mkdir` – Create a directory.
– `rmdir` – Remove an empty directory.
3. System Information:
– `uname -a` – Display system information.
– `df -h` – Show disk usage.
– `free -m` – Display memory usage.
– `top` or `htop` – Display real-time system statistics.
4. Networking:
– `ping` – Check network connectivity.
– `ifconfig` or `ip addr` – Display network interfaces.
– `netstat` – Display network connections.
– `ssh` – Connect to a remote server securely.
5. Process Management:
– `ps` – Display running processes.
– `kill` – Terminate a process by PID.
– `killall` – Terminate processes by name.
– `bg` and `fg` – Manage background and foreground processes.
6. Permissions:
– `chmod` – Change file permissions.
– `chown` – Change file ownership.
– `chgrp` – Change file group ownership.
7. Searching:
– `find` – Search for files in a directory hierarchy.
– `grep` – Search text using patterns.
– `locate` – Find files by name.
8. Compression:
– `tar` – Archive files.
– `gzip` or `bzip2` – Compress files.
– `unzip` – Extract files from a ZIP archive.
Advanced Commands:
– `awk` – Pattern scanning and processing.
– `sed` – Stream editor for filtering and transforming text.
– `cron` – Schedule tasks.
– `rsync` – Synchronize files and directories between two locations.
Practice Commands:
<h1>Create a directory and navigate into it</h1> mkdir interview_prep && cd interview_prep <h1>Create a sample file and display its contents</h1> touch sample.txt echo "This is a sample file for Linux commands practice." > sample.txt cat sample.txt <h1>List files with detailed information</h1> ls -l <h1>Check disk usage</h1> df -h <h1>Display running processes</h1> ps aux <h1>Search for a specific process</h1> ps aux | grep ssh <h1>Change file permissions</h1> chmod 755 sample.txt <h1>Archive and compress files</h1> tar -czvf archive.tar.gz sample.txt
What Undercode Say:
Linux commands are the backbone of system administration, DevOps, and many IT roles. Mastering these commands not only helps in interviews but also in day-to-day operations. Commands like grep, awk, and `sed` are powerful tools for text processing, while `rsync` and `cron` are essential for automation and backups. Understanding file permissions with chmod, chown, and `chgrp` ensures secure system management. Networking commands like ping, ifconfig, and `ssh` are crucial for troubleshooting and remote server management. Practice these commands regularly to build confidence and efficiency. For further reading, explore resources like Linux Command Line Basics and Advanced Linux Commands. Keep experimenting with different commands and scripts to deepen your understanding and prepare for real-world challenges.
References:
initially reported by: https://www.linkedin.com/posts/sachin2815_top-linux-commands-activity-7300764109719904257-R-Lq – Hackers Feeds
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