ls: Lists directories in the current directory.Example:ls -llists details of files and directories.cd: Changes the current directory.Example:cd /path/to/directory.pwd: Prints the current directory.Example:pwd.cat: Displays the content of a file.Example:cat filename.echo: Outputs the strings it is being passed as arguments.Example:echo "Hello, World!".touch: Creates a new empty file.Example:touch filename.rm: Removes files.Example:rm filename.cp: Copies files and directories.Example:cp source destination.mv: Moves or renames files.Example:mv old_filename new_filename.mkdir: Creates a new directory.Example:mkdir directoryname.rmdir: Removes an empty directory.Example:.rmdir directorynamefind: Searches for files in a directory hierarchy.Example:find . -name "*.txt".grep: Searches the given input files for lines containing a match to the given patterns.Example:grep "pattern" filename.head: Outputs the first part of files.Example:head filename.tail: Outputs the last part of files.Example:tail filename.cut: Removes sections from each line of files.Example:cut -c 1-10 filename.sort: Sorts lines in text files.Example:sort filename.uniq: Filters out repeated lines from sorted files.Example:uniq filename.diff: Compares files line by line.Example:diff file1 file2.cmp: Compares two files byte by byte.Example:cmp file1 file2.ln: Creates links between files.Example:ln -s target linkname.tar: Archives files.Example: tar cvf archive.tar directoryname.gzip: Compresses files.Example: gzip filename.gunzip: Decompresses files.
Example:gunzip filename.gz.man: Provides manual pages for commands.Example: man ls.uname: Prints system information.Example: uname -a.whoami: Prints effective userid.Example: whoami.date: Displays or sets the system date and time.Example: date.df: Reports disk space usage.Example: df -h.du: Estimates file and directory space usage.Example: du -sh directoryname.ping: Tests network connectivity.Example: ping www.google.com.netstat: Displays network connections.Example: netstat.route: Shows or modifies kernel routing tables.Example: route -n.wget: Downloads files from the internet.Example: wget http://example.com.curl: Transfers data to or from a server.Example: curl http://example.com.ssh: Secure shell login to remote servers.Example: ssh username@hostname.scp: Secure copy files to and from remote hosts.Example: scp file username@hostname:/path.vi: A text editor.
Example:vi filename.nano: A simple text editor.
Example:nano filename.top: Displays dynamic real-time view of a running system.
Example:top.ps: Reports a snapshot of the current processes.
Example:ps -ef.kill: Sends signals to processes.
Example:kill -9 pid.killall: Sends signals to all instances of a particular process.
Example:killall processname.traceroute: Traces and displays the route that a packet takes to reach a network host.
Example:traceroute www.google.com.ifconfig: Configures network interface parameters.Example: ifconfig.ufw: Uncomplicated Firewall.Example: ufw enable.iptables: User-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall.Example: iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT.apt: Advanced package management command line tool.Example: apt update && apt upgrade.pacman: Package management utility in Arch Linux.Example: pacman -Syu.yum: Yellowdog Updater Modified, a package manager for RPM-based Linux distributions.Example: yum update.
I’m Abhishek, a DevOps, SRE, DevSecOps, and Cloud expert with a passion for sharing knowledge and real-world experiences. I’ve had the opportunity to work with Cotocus and continue to contribute to multiple platforms where I share insights across different domains:
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DevOps School – Tech blogs and tutorials
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Holiday Landmark – Travel stories and guides
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Stocks Mantra – Stock market strategies and tips
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My Medic Plus – Health and fitness guidance
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TrueReviewNow – Honest product reviews
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Wizbrand – SEO and digital tools for businesses
I’m also exploring the fascinating world of Quantum Computing.