Basic Linux commands

Recap. 🙃

In Day-2 of learning DevOps, we covered what Linux is and some of its fundamental commands . Let's continue by learning more about these commands.

Basic commands in Linux.

diff: Find differences between files. Example: diff file1.txt file2.txt compares two files.
cmp: Check if files are identical. Example: cmp file1.txt file2.txt compares byte by byte.
comm: Combine diff and cmp. Example: comm file1.txt file2.txt shows common lines.
sort: Sort file content. Example: sort file.txt arranges lines alphabetically.
export: Set environment variables. Example: export MY_VAR=value sets an environment variable.
zip: Zip files. Example: ziparchive.zipfiles/ creates a zip archive.
unzip: Unzip files. Example: unziparchive.zip extracts files from a zip archive.
ssh: Secure Shell. Example: ssh user@hostname connects to a remote server.
service: Start and stop services. Example: service apache2 start manages services.
ps: Display active processes. Example: ps aux lists all processes.
kill and killall: Terminate processes. Example: kill -9 PID forcefully stops a process by its process ID.
df: Display disk info. Example: df -h shows disk space usage.
mount: Mount file systems. Example: mount /dev/sdb1 /mnt mounts a partition to a directory.
chmod: Change file permissions. Example: chmod +xscript.sh makes a script executable.
chown: Grant ownership. Example: chown user:group file.txt changes file ownership.
ifconfig: Display network interfaces and IP addresses. Example: ifconfig eth0 shows network details.
traceroute: Trace network hops. Example: traceroutegoogle.com traces the route to Google’s server.
wget: Download files from the internet. Example: wgethttps://example.com/file.zip downloads a file.
ufw: Firewall management. Example: ufw allow 80/tcp allows incoming HTTP traffic.
iptables: Base firewall. Example: iptables -A INPUT -p tcp --dport 22 -j ACCEPT allows SSH traffic.