Linux/Linux commands at main · akramdevopstrainer/Linux · GitHub

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📂 File Operations:
- `ls`: Lists all files and directories in the present working directory.
- `cd`: Changes the directory.
- `pwd`: Displays the present working directory.
- `cat`: Displays or creates a file and joins two files.
- `touch`: Creates or modifies a file.
- `rm`: Deletes a file.
- `cp`: Copies files from source to destination.
- `mv`: Moves files from source to destination.
- `find`: Finds a file or directory by name starting from the root.
- `file`: Determines the file type.
- `less`: Views file content page by page.
- `head`: Views the first ten lines of a file.
- `tail`: Views the last ten lines of a file.
- `lsof`: Shows which files are opened by which process.
- `du`: Shows the size of each directory.
- `fdisk`: Disk partition manipulation command.

📁 Directory Operations:
- `mkdir`: Creates a new directory in the present working directory.
- `rmdir`: Deletes a directory.
- `cp -r`: Copies directories recursively.
- `mv`: Renames directories.
- `find`: Finds a directory starting from root.

🔄 Process Operations:
- `ps`: Displays currently active processes.
- `top`: Displays all running processes.
- `kill`: Kills a process with a given PID.
- `pkill`: Kills a process with a given name.
- `bg`: Resumes suspended jobs without bringing them to foreground.
- `fg`: Brings jobs to the foreground.
- `renice`: Changes the priority of a running process.

🔒 File Permissions:
- `chmod`: Changes the permissions of a file.
- `chown`: Changes file owner.
- `chgrp`: Changes group owner.

🔗 Networking:
- `ping`: Pings a host and outputs results.
- `whois`: Gets whois information for a domain.
- `dig`: Gets DNS information for a domain.
- `netstat`: Displays various network-related information.
- `ifconfig`: Displays IP addresses of all network interfaces.
- `ssh`: Remote login into a host as a user.
- `scp`: Transfers files between hosts over SSH.
- `wget`: Downloads files from the web.
- `curl`: Sends a request to a URL and returns the response.
- `traceroute`: Prints the route that a packet takes to reach a domain.
- `ss`: Investigates sockets, an alternative to netstat.
- `nmap`: Network exploration tool and security scanner.

🗃️ Archives and Compression:
- `tar`: Creates, extracts tar archives.
- `gzip`: Compresses and decompresses files.
- `zip`: Creates and extracts zip archives.

📜 Text Processing:
- `grep`: Searches for patterns in files.
- `echo`: Prints text.
- `sed`: Replaces strings in files.
- `diff`: Compares two files and shows differences.
- `wc`: Counts lines, words, and characters in a file.
- `awk`: A versatile programming language for working on files.
- `cut`: Cuts out specific fields in a file using a delimiter.

💾 Disk Usage:
- `df`: Shows disk usage.
- `du`: Shows directory space usage.

📊 System Info:
- `date`: Shows the current date and time.
- `uptime`: Shows current uptime.
- `w`: Displays who is online.
- `uname`: Shows kernel information.

📦 Package Installations:
- `sudo apt-get`: Commands for package management.

📜 Shell Scripting:
- Basic commands used in bash scripts.

🌐 Version Control (Git commands):
- Basic commands for Git version control.

🔧 Environment Variables:
- Manipulating environment variables in the shell.

⏰ Job Scheduling (Cron Jobs):
- Scheduling and managing cron jobs.

📦 Package Installations (using pip):
- Installing Python packages using pip.

📊 System Monitoring and Performance:
- Various commands to monitor system performance.

🔍 Search and Find:
- Commands to search for files and locate binaries.

⚠️ **Note**: Always exercise caution when using advanced commands or commands with potential system impacts.