As cloud computing and DevOps continue to dominate the tech landscape, Linux remains the backbone of modern infrastructure. Many professionals, including cloud engineers and DevOps practitioners, are revisiting Linux fundamentals to strengthen their expertise.
You Should Know: Essential Linux Commands for Cloud & DevOps
1. Basic Linux Commands
– `ls` – List directory contents
– `cd` – Change directory
– `pwd` – Print working directory
– `mkdir` – Create a directory
– `rm` – Remove files/directories
– `cp` – Copy files/directories
– `mv` – Move/rename files
2. File Permissions & Ownership
– `chmod` – Change file permissions
chmod 755 script.sh Sets rwx for owner, rx for group/others
– `chown` – Change file ownership
chown user:group file.txt
3. Process Management
– `ps` – List running processes
ps aux | grep nginx
– `kill` – Terminate a process
kill -9 [bash]
– `top` / `htop` – Monitor system processes
4. Networking Commands
– `ifconfig` / `ip a` – View network interfaces
– `netstat` – Display network connections
netstat -tuln
– `ping` – Check connectivity
– `ssh` – Securely connect to remote servers
ssh user@remote-server
5. Package Management
- Debian/Ubuntu (APT)
sudo apt update && sudo apt upgrade sudo apt install nginx
- RHEL/CentOS (YUM/DNF)
sudo yum update sudo yum install httpd
6. Log Inspection
– `tail` – View the end of a file
tail -f /var/log/nginx/access.log
– `grep` – Search within files
grep "ERROR" /var/log/syslog
7. Disk & Memory Management
– `df` – Check disk space
df -h
– `free` – Check memory usage
free -m
8. Shell Scripting Basics
A simple backup script:
!/bin/bash backup_dir="/backups" mkdir -p $backup_dir tar -czf "$backup_dir/backup_$(date +%Y%m%d).tar.gz" /home/user
What Undercode Say
Linux is the foundation of cloud computing, DevOps, and automation. Mastering these commands ensures smoother cloud deployments, better troubleshooting, and efficient scripting. Whether you’re managing AWS, Azure, or Kubernetes, Linux proficiency is non-negotiable.
Expected Output:
$ ls -l total 4 -rwxr-xr-x 1 user group 123 May 5 10:00 script.sh
For further learning, check:
Prediction
As cloud adoption grows, Linux expertise will become even more critical, with demand increasing for professionals skilled in automation, security, and containerization.
References:
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