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2025-02-16
For those preparing for Linux-related technical interviews, mastering a wide range of commands and concepts is crucial. Below are some practice-verified codes and commands to help you prepare:
Basic Linux Commands
1. Check System Information
uname -a
This command displays the system’s kernel name, version, and other details.
2. List Directory Contents
ls -l
Lists files and directories in long format.
3. Search for a Specific String in Files
grep "search_term" filename
Searches for a specific term within a file.
4. Check Disk Usage
df -h
Displays disk space usage in a human-readable format.
5. Monitor Running Processes
top
Provides a real-time view of system processes.
Intermediate Linux Commands
1. Create a New User
sudo adduser newusername
Adds a new user to the system.
2. Set File Permissions
chmod 755 filename
Changes file permissions to read, write, and execute for the owner, and read and execute for others.
3. Compress Files
tar -czvf archive.tar.gz /path/to/directory
Compresses a directory into a `.tar.gz` file.
4. Network Configuration
ifconfig
Displays network interface configuration.
5. Schedule Tasks with Cron
crontab -e
Opens the cron table for editing to schedule tasks.
Advanced Linux Commands
1. Check Open Ports
netstat -tuln
Lists all open ports and their associated services.
2. Analyze Log Files
tail -f /var/log/syslog
Monitors the system log file in real-time.
3. Manage Services
systemctl start servicename
Starts a specific service.
4. Secure Copy Files Between Systems
scp /local/file username@remote:/remote/directory
Copies files securely between local and remote systems.
5. Check Memory Usage
free -m
Displays memory usage in megabytes.
What Undercode Say
Mastering Linux commands is essential for anyone pursuing a career in IT, DevOps, or system administration. The commands listed above cover a broad spectrum of functionalities, from basic file management to advanced system monitoring and network configuration. Practicing these commands will not only prepare you for technical interviews but also enhance your day-to-day productivity.
For further reading, consider exploring the following resources:
By consistently practicing and applying these commands, you’ll build a strong foundation in Linux, making you a more competent and confident IT professional. Whether you’re managing servers, automating tasks, or troubleshooting issues, these skills are invaluable in the ever-evolving tech landscape.
References:
Hackers Feeds, Undercode AI
