Linux Commands Assessment Test

A Linux Commands Assessment Test evaluates a candidate's proficiency with Linux command-line utilities and their ability to perform common tasks and troubleshooting using the Linux shell.

A Linux Commands Assessment Test evaluates candidates for:

1. Basic Command Line Navigation

• File and Directory Operations:
  • Listing Files: Using ls to list directory contents.
  • Changing Directories: Using cd to navigate between directories.
  • Creating and Removing Files/Directories: Using mkdir, rmdir, touch, rm, and cp.
  • Renaming and Moving: Using mv to rename or move files and directories.
• File Viewing and Editing:
  • Viewing File Content: Using cat, less, more, head, and tail.
  • Searching within Files: Using grep to search for patterns in files.
  • File Editing: Basic knowledge of editors like nano, vim, or vi.

2. File Permissions and Ownership

• Understanding Permissions:
  • Viewing Permissions: Using ls -l to display file permissions.
  • Changing Permissions: Using chmod to modify file permissions.
  • Changing Ownership: Using chown to change file owner and group.
  • Managing Groups: Using chgrp to change the group ownership.

3. File Compression and Archiving

• Compression Tools:
  • Creating and Extracting Archives: Using tar, gzip, gunzip, bzip2, and bunzip2.
  • Working with Zip Files: Using zip and unzip.

4. System Monitoring and Management

• System Information:
  • Viewing System Info: Using uname, top, htop, dmesg, and vmstat.
  • Disk Usage: Using df to check disk space usage and du to check directory sizes.
  • Memory Usage: Using free and top to monitor memory usage.
• Process Management:
  • Viewing Processes: Using ps, top, and htop.
  • Managing Processes: Using kill, pkill, and killall to terminate processes.

5. Networking Commands

• Network Configuration and Diagnostics:
  • Checking Network Status: Using ifconfig, ip a, and ip addr to display network interfaces.
  • Testing Connectivity: Using ping to test network connectivity.
  • Network Statistics: Using netstat or ss to display network connections and routing tables.
  • DNS Lookup: Using nslookup or dig to perform DNS lookups.

6. Package Management

• Package Installation and Removal:
  • Using APT (Debian/Ubuntu): Commands like apt-get, apt-cache, and dpkg.
  • Using YUM/DNF (Red Hat/CentOS): Commands like yum, dnf, and rpm.

7. User and Group Management

• Managing Users and Groups:
  • Adding and Removing Users: Using useradd, usermod, userdel.
  • Adding and Removing Groups: Using groupadd, groupdel, usermod.
  • Password Management: Using passwd to change user passwords.

8. Shell Scripting

• Basic Scripting:
  • Creating and Running Scripts: Writing simple shell scripts using bash or sh.
  • Variables and Control Structures: Using variables, loops (for, while), and conditionals (if, else).
  • Permissions: Making scripts executable with chmod.

9. File Searching and Pattern Matching

• Finding Files:
  • Using find: Searching for files and directories based on criteria.
  • Using locate: Quickly finding files using the locate command and updatedb.
• Pattern Matching:
  • Using grep: Searching for patterns within files.
  • Regular Expressions: Basic knowledge of regular expressions and their use with grep.

10. Backup and Restore

• Creating Backups: Using tar, cp, or rsync for backup purposes.
• Restoring Data: Restoring data from backup archives.

11. System Startup and Shutdown

• Managing Services:
  • Starting and Stopping Services: Using systemctl or service to manage services.
  • Checking Service Status: Using systemctl status or service --status-all.
• System Shutdown and Reboot:
  • Rebooting: Using reboot or shutdown -r.
  • Shutting Down: Using shutdown -h to halt the system.

12. Advanced Topics

• Environment Variables: Viewing and setting environment variables using env, export, and unset.
• Cron Jobs: Scheduling tasks using cron and crontab.

Overall, a Linux Commands Assessment Test evaluates a candidate's ability to use the Linux command line effectively, manage system resources, and perform various administrative tasks. It ensures that candidates are proficient in navigating the filesystem, managing files, and using essential system utilities.