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In the realm of cloud engineering, mastering Linux commands is essential for efficient system management, troubleshooting, and automation. Below is a list of 50 Linux commands that every cloud engineer should be familiar with, along with practical examples and steps to implement them.
You Should Know:
1. `ls` – List directory contents
ls -l /home/user
2. `cd` – Change directory
cd /var/log
3. `pwd` – Print working directory
pwd
4. `mkdir` – Create a directory
mkdir new_folder
5. `rm` – Remove files or directories
rm -r old_folder
6. `cp` – Copy files or directories
cp file1.txt /backup/
7. `mv` – Move or rename files or directories
mv file1.txt file2.txt
8. `touch` – Create an empty file
touch newfile.txt
9. `cat` – Display file content
cat /etc/hosts
10. `grep` – Search text using patterns
grep "error" /var/log/syslog
11. `find` – Search for files in a directory hierarchy
find /home -name "*.log"
12. `chmod` – Change file permissions
chmod 755 script.sh
13. `chown` – Change file owner and group
chown user:group file.txt
14. `ps` – Display information about running processes
ps aux
15. `top` – Display real-time system statistics
top
16. `kill` – Terminate processes
kill -9 1234
17. `df` – Report file system disk space usage
df -h
18. `du` – Estimate file space usage
du -sh /var/log
19. `tar` – Archive files
tar -czvf archive.tar.gz /home/user
20. `ssh` – Secure Shell for remote login
ssh user@remote_host
21. `scp` – Securely copy files between hosts
scp file.txt user@remote_host:/path/
22. `rsync` – Synchronize files and directories
rsync -avz /source/ /destination/
23. `curl` – Transfer data from or to a server
curl -O https://example.com/file.zip
24. `wget` – Download files from the web
wget https://example.com/file.zip
25. `netstat` – Display network connections
netstat -tuln
26. `ifconfig` – Configure network interfaces
ifconfig eth0
27. `ping` – Test network connectivity
ping google.com
28. `traceroute` – Trace the route packets take to a network host
traceroute google.com
29. `dig` – DNS lookup utility
dig example.com
30. `nslookup` – Query Internet name servers
nslookup example.com
31. `iptables` – Administration tool for IPv4 packet filtering
iptables -L
32. `cron` – Schedule tasks
crontab -e
33. `systemctl` – Control the systemd system and service manager
systemctl start apache2
34. `journalctl` – Query and display messages from the systemd journal
journalctl -xe
35. `uname` – Print system information
uname -a
36. `hostname` – Show or set the system’s host name
hostname
37. `whoami` – Display the current username
whoami
38. `passwd` – Change user password
passwd
39. `useradd` – Create a new user
useradd newuser
40. `usermod` – Modify a user account
usermod -aG sudo newuser
41. `groupadd` – Create a new group
groupadd newgroup
42. `groupmod` – Modify a group
groupmod -n newgroup oldgroup
43. `ln` – Create links between files
ln -s /path/to/file /path/to/link
44. `alias` – Create command shortcuts
alias ll='ls -la'
45. `history` – Display command history
history
46. `man` – Display manual pages
man ls
47. `echo` – Display a line of text
echo "Hello, World!"
48. `date` – Display or set the system date and time
date
49. `uptime` – Show how long the system has been running
uptime
50. `shutdown` – Shutdown or restart the system
shutdown -h now
What Undercode Say:
Mastering these Linux commands is crucial for cloud engineers to efficiently manage systems, troubleshoot issues, and automate tasks. These commands form the backbone of system administration and are indispensable in cloud environments. For further reading, check out the Linux Command Line Guide and Advanced Bash-Scripting Guide. Practice these commands in a safe environment to build confidence and expertise.
References:
Reported By: Dharamveer Prasad – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
