Linux Command Cheat Sheet - File Permissions - Network - Compression/Archives - Package/Source - Search - SSH/Telnet - File Transfer - Disk Usage - Directory Traverse - System - Hardware - Users - File Commands - Process

Oct 14, 2026

Upload by Aria

A practical Linux command cheat sheet covering core administration and troubleshooting tasks. It summarizes file permission management with chmod and ownership changes via chown, plus networking commands for interface configuration, DNS queries, and port inspection. It also lists archive and compression tools (tar, gzip), package management and source installation steps, search utilities (grep, find, locate), and common SSH/telnet login and file transfer workflows (scp, rsync).

LanguageEnglish

CategoryPresentations

FormatPDF

Pages1

AccessFree to download

File permission related

Network

Compression / Archives

Install package

Install from source

File transfer

Disk usage

Directory traverse

System

Hardware

Users

File commands

Process related

FILE PERMISSION RELATED chmod octal file-name Example chmod 777 /data/test.c chmod 755 /data/test.c chown owner-user file =>Change the permissions of file to octal =>Set rwx permission for owner,group,world =>Set rwx permission for owner, rx for group and world =>Change owner of the file chown owner-user:owner-group file-name =>Change owner and group owner of the file chown owner-user:owner-group directory =>Change owner and group owner of the directory NETWORK ip addr show =>Display all network interfaces and ip address (a iproute2 command,powerful than ifconfig) ip address add [192.168.0.1](192.168.0.1) dev eth0 =>Set ip address ethtool eth0 mii-tool eth0 ping host whois domain dig domain dig-x host [host google.com](host google.com)[ ](host google.com)hostname –iwget file =>Linux tool to show ethernet status =>Linux tool to show ethernet status =>Send echo request to test connection =>Get who is information for domain =>Get DNS information for domain =>Reverse lookup host =>Lookup DNS ip address for the name =>Lookup local ip address =>Download file netstat-tupl =>Listing all active listening ports COMPRESSION / ARCHIVES tar cf home.tar home =>Create tar named home.tar containing home/ tar xf file.tar =>Extract the files from file.tar tar czf file.tar.gz files =>Create a tar with gzip compression gzip file =>Compress file and renames it to file.gz INSTALL PACKAGE rpm-i pkgname.rpm =>Install rpm based package rpm-e pkgname =>Remove package INSTALL FROM SOURCE ./configure makemake install SEARCH grep pattern files grep-r pattern dir locate file =>Search for pattern in files =>Search recursively for pattern in dir =>Find all instances of file find /home/tom-name 'index*' find /home-size +10000k =>Find files names that start with "index"=>Find files larger than 10000k in /home LOGIN (SSHAND TELNET) ssh user@host =>Connect to host as user ssh-p port user@host =>Connect to host using specific port telnet host =>Connect to the system using telnet port FILE TRANSFER scp scp file.txt server2:/tmp =>Secure copy file.txt to remote host /tmp folder rsync rsync-a /home/apps /backup/ =>Synchronize source to destination DISK USAGE df –h =>Show free space on mounted filesystems df-i =>Show free inodes on mounted filesystems fdisk-l =>Show disks partitions sizes and types du-ah =>Display disk usage in human readable form du-sh =>Display total disk usage on the current directory findmnt =>Displays target mount point for all filesystem mount device-path mount-point =>Mount a device DIRECTORY TRAVERSE cd .. =>To go up one level of the directory tree cd =>Go to $HOME directory cd /test =>Change to /test directory SYSTEM uname-a uname-ruptime hostname hostname-i last reboot date cal w whoami =>Displaylinux system information =>Display kernel release information =>Show how long the system has been running + load =>Show system host name =>Display the IP address of the host =>Show system reboot history =>Show the current date and time =>Show this month calendar =>Display who is online =>Who you are logged in as finger user =>Display information about user HARDWARE dmesg =>Detected hardware and boot messages cat /proc/cpuinfo =>CPU model cat /proc/meminfo =>Hardware memory cat /proc/interrupts =>Lists the number of interrupts per CPU per I/O device lshw =>Displays information on hardware configuration of the system lsblk =>Displays block device related information in Linux free-m =>Used and free memory (-m for MB) lspci-tv =>Show PCI devices lsusb-tv =>Show USB devices dmidecode =>Show hardware info from the BIOS hdparm-i /dev/sda =>Show info about disk sda hdparm-tT /dev/sda =>Do a read speed test on disk sda badblocks-s /dev/sda =>Test for unreadable blocks on disk sda USERS id =>Show the active user id with login and group last =>Show last logins on the system who =>Show who is log

FAQs

How do you change file permissions using octal notation in this sheet?

Use chmod with an octal value, e.g., chmod 777 /data/test.c or chmod 755 /data/test.c. The sheet also notes setting rwx for owner and different permissions for group/world.

Which commands are listed for network interface and IP address inspection or configuration?

Use ip addr show to display interfaces and IPs, and ip address add [192.168.0.1] dev eth0 to set an IP. For DNS/queries, it lists dig and whois/domain lookups, plus hostname and reverse lookup.

How can you transfer files and synchronize directories?

Use scp to copy files to a remote path, e.g., scp file.txt server2:/tmp. For synchronization, use rsync -a /home/apps /backup/ to mirror changes from source to destination.

Oct 14, 2026

Upload by Aria