Linux Cheat Sheet Commands
In this page, you will find Basic Linux Commands and important ones in the title of Linux Cheat Sheet Commands. As you know Linux is widely used in Networking World. Network Engineers and system Administrators uses this important operation system commands a lot in their Daily routine or critical operation activities. So, I have created this Linux Cheat Sheet for you to use it during your network or system management activities. Anymore, you do not search any Linux command on internet. Because you will find what you need on Linux Cheat Sheet Commands. With this Linux command line cheat sheet, you will be faster on your configuration activities like other cheat sheets like Protocol Cheat Sheets, Python Cheat Sheet etc.
You can downlod Linux Cheat Sheet Commands in pdf format and use anywehere you need offline. You can also visit ipcisco.com and use these commands here online.
System Information Commands
| uname -a | shows Linux system info |
| uname -r | shows kernel release info |
| cat /etc/redhat-release | shows installed redhat version |
| uptime | displays system running/life time |
| hostname | shows system host name |
| hostname -I | shows ip addresses of the host |
| last reboot | displays system reboot history |
| date | displays current date and time |
| cal | displays monthly calendar |
| mount | shows mounted filesystems |
File Commands
| ls -l | lists files detailly (file type, user, permission etc) |
| ls -lh | lists files detailly with human readable format |
| ls -al | lists files detailly with hidden files |
| pwd | shows present directory |
| mkdir directory | creates a directory |
| rm xyz | deletes file xyz |
| rm -r /xyz | deletes directory /xyz and its contents recursively |
| rm -f abc | forcefully deletes abc file without confirmation |
| rm -rf /xyz | forcefully deletes directory /xyz recursively |
| cp aaa bbb | copies aaa file to bbb file |
| cp -r /xxx /yyy | copies /xxx directıry to /yyy directory |
| mv aaa bbb | renames or moves file aaa to file bbb |
| touch abc | creates an empty file named abc |
| cat abc | used to view file abc |
| less abc | browse through a text file abc |
| head abc | displays first 10 lines of file abc |
| tail abc | displays last 10 lines of file abc |
| tail -f abc | displays last 10 lines of file abc and follow it as it grows |
| tail -F abc | outputs last lines of abc as it changes |
| file abc | gets type of abc |
| gpg -c abc | encrypts file abc |
| gpg abc | decrypts file abc |
| gpg abc | decrypts file abc |
| gpg abc | decrypts file abc |
| dir | shows files in the current directory |
| put abc | uploads file ‘abc’ from local to remote device |
| get file | downloads file ‘abc’ from remote to local device |
ls Options
| -a | display hidden files |
| -R | recursive list |
| -r | reverse order |
| -t | sort by last modified |
| -S | sort by file size |
| -l | long listing format |
| -1 | one file per line |
| -m | comma-separated output |
| -Q | quoted output |
Process Management Commands
| ps | displays currently running processes |
| ps PID | gives the status of a particular process |
| pidof | gives the process ID of a process |
| ps -ef | displays all running processes on the system |
| ps -ef | grep xyz | displays process information for xyz |
| top | displays and manages the top processes |
| htop | interactive process viewer (top alternative) |
| kill pid | kills process with process ID of pid |
| pkill xyz | kills process with name xyz |
| killall abc | kills all processes named abc |
| program & | starts program in the background |
| bg | lists and resumes stopped jobs in the background |
| fg | brings the most recent background job to foreground. |
| fg x | brings job x to the foreground |
| nice | starts a process with a given priority |
| renice | changes priority of an already running process |
| pstree | displays processes in a tree-like diagram |
| pmap | displays a memory usage map of processes |
| lsof | lists files opened by running processes |
Networking Commands
| arp | displays ARP table of the device |
| arpwatch | displays ethernet activity and Ethernet/ip pairings |
| bmon | displays bandwidth, captures |
| curl | used for for file transfer |
| dhclient | used to analyze clients ip address, subnet mask, gateway, dns server |
| dig | used for simple DNS lookup |
| dstat | collects and shows system resources |
| ethtool | used to check settings of your NIC |
| ftp | used for for file transfer |
| host | use dfor DNS lookup |
| hping3 | used for packet analyze |
| ifconfig | used to monitor and configure network interfaces |
| ip address | used to check network interfaces and routing activities |
| iptables | used for ip packet filtering |
| iftop | displays current bandwidth usage |
| ifup | enables interfaces |
| ifdown | disables interfaces |
| iwconfig | used to monitor and configure wireless interfaces |
| nload | used as bandwidth monitoring tool |
| nmap | used for security audits |
| nslookup | used also for DNS query |
| ip route | routing table management |
| netstat | to check network connections |
| route | displays and manipulate IP routing table |
| ping | used to check reachability |
| sftp | secured file transfer |
| ss | gives detailed information about the sockets |
| ssh | used for secure connection |
| scp | secured file transfer |
| tcpdump | used for analyzing and capturing |
| telnet | used for classical unsecure connection |
| tshark | used for packet analyze |
| tshark | analyzing and capturing |
| traceroute | used for path tracking |
| w | shows who is logged in and what they do |
| wget | used to download the content of the web servers |
| whois | checks the whois database and return with IP and Domain info |
Help Commands
| command -h / command –help | to review all available options of the “command” |
| info command | to find info documents about the “command” |
| whatis command | displays a single line description about the”command” |
| $ man UNIXCOMMAND | to view detailed man page of the “command” |
| apropos | used to search man pages for available commands on a specific functionality. |
User Information Commands
| id | shows user&group ids of the current user |
| last | shows the last users logged on |
| whoami | shows who you are logged in as |
| who | shows who is logged into the system |
| w | shows who is logged in and what they do |
| groupadd test | creates group “test” |
| useradd -c “GK” -m Gokhan | creates “Gokhan” account with comment “GK” |
| userdel Gokhan | deletes account “Gokhan” |
| usermod -aG Networkers Gokhan | adds account “Gokhan” to the “Networkers” group |
File Permissions
| chown user | changes ownership of a file/directory |
| chown user:group filename | changes user and group for a file or directory |
| File Permissions | r (read) permission, 4 w (write) permission, 2 x (execute) permission, 1 -= no permission |
| File Owner | owner/group/everyone |
| File Permissions Examples | 777 | Owner, Group, Everyone has rwx permissions
744 | Owner has rwx permission, Group, Everyone has r permission 755 | Owner has rwx permission, Group, Everyone has rx permissions 776 | Owner, Group has rwx permission, Everyone has rw permissions |
Search Commands
| grep x file | searches for x in file |
| grep -i | case insensitive search |
| grep -r | recursive search |
| grep -v | inverted search |
| grep -o | shows only matched part of the file |
| find /dir/ -name aaa* | finds files starting with aaa in dir |
| find /dir/ -user Gokhan | finds files owned by Gokhan in dir |
| find /dir/ -mmin 10 | finds files modifed less than 10 minutes ago in dir |
| find /home -size +500M | finds files larger than 500MB in /xyz |
| find [/folder/location] -name [x] | finds file names starting with character x |
| whereis aaa | locates the binary, source, and manual page of aaa |
| locate abc | finds the location of abc quickly |
File Transfer Commands
| scp file.txt server:/tmp | secure copy file.txt to the /tmp folder on server |
| scp server:/var/www/*.html /tmp | secure copy *.html files in /var/www/ directory on server to the local /tmp folder |
| scp -r server:/var/www /tmp | secure copy all files and directories recursively from server to the current system’s /tmp folder. |
| rsync -a /home /backups/ | synchronize /home to /backups/ |
| rsync -avz /home server:/backups/ | Synchronize files/directories between the local and remote system with compression enabled |
Disk Usage Commands
| df | shows file system disk usage |
| du | shows disk usage for specific directories |
| du -a | shows disk usage for all the files |
| du -s | shows used total disk space |
| free | shows free and used memory on the system |
| fdisk | used to manipulate disk partition table |
| fdisk -l | used to list disc partition table |
| sfdisk | used to manipulate disk partition table with more features |
| cfdisk | linux partition editor with an interactive user interface |
| findmnt | lists all mounted file systems |
| mount | mounts a filesystem |
| parted | lists and modifies partitions |
| parted -l | lists the partition details |
| lsblk | lists all the storage blocks including partitions |
| blkid | prints the block device partitions and storage media |
Compress and Decompress Commands
| gzip abc | compresses abc file using gzip. |
| bzip2 abc | compresses abc file using bzip2. |
| zip abc.zip abc | compresses abc file into the archive abc.zip. |
| tar -czvf archive.tar.gz /home/temp2/ | compresses a full directory with all subdirectories |
| gzip -d xyz.gz | extracts xyz.gz with gzip utility |
| gunzip xyz.gz | extracts xyz.gz with gzip utility |
| bzip2 -d file.php.bz2 | extracts xyz.gz with bzip2 utility |
| bunzip2 file.php.bz2 | extracts xyz.gz with bzip2 utility |
| unzip xyz.zip | extracts xyz.zip with zip utility |
| gunzip -c output.txt.gz | to view the contents of both files without extracting |
| tar cf archive.tar directory | creates tar named archive.tar containing directory |
| tar xf archive.tar | extracts the contents from archive.tar |
| tar czf archive.tar.gz directory | creates a gzip compressed tar file name archive.tar.gz |
| tar xzf archive.tar.gz | extracts a gzip compressed tar file |
| tar cjf archive.tar.bz2 directory | creates a tar file with bzip2 compression |
| tar xjf archive.tar.bz2 | extracts a bzip2 compressed tar file |
Install Commands
| yum search keyword | compresses abc file using gzip. |
| yum install abc | installs abc package |
| yum info abc | displays description and summary info about abc package |
| rpm -i abc.rpm | installs package from local file named abc.rpm |
| yum remove abc | Remove/uninstall abc package |
| yum list installedl | lists all installed packages with yum |
| yum search [keyword] | finds a package by a related keyword |
| yum info [package_name] | shows package information and summary |
| yum install [package_name.rpm] | installs a package using the YUM package manager |
| dnf install [package_name.rpm] | installs a package using the DNF package manager |
| apt-get install [package_name] | installs a package using the APT package manager |
| rpm -i [package_name.rpm] | installs an .rpm package from a local file |
| rpm -e [package_name.rpm] | removes an .rpm package |
Hardware Information Commands
| dmesg | displays messages in kernel ring buffer |
| cat /proc/cpuinfo | displays CPU information |
| cat /proc/meminfo | displays memory information |
| lspci -tv | displays PCI devices |
| lsusb -tv | displays USB devices |
| dmidecode | displays DMI/SMBIOS from BIOS |
| hdparm -i /dev/sda | displays info about disk sda |
| hdparm -tT /dev/sda | performs a read speed test on disk sda |
| badblocks -s /dev/sda | tests for unreadable blocks on disk sda |
What is Linux?
Linux is the most important operating system in Networking World. Many Network Engineers, Network Administrators and Network Technicians use Linux in different areas of Computer Networking. They use different commands of Linux everyday. But sometimes, some commands can be forgotten. To overcome this issue, I have created a Linux Cheat Sheet for you! In this page, you will find Linux Cheat Sheet Commands.
Is Linux an Operating System?
Because of the fact that there are many versions, “is Linux a Opearing Sytem?” quesiton is very common. The answer is certainly Yes! Linux is an Open source Unix ilke Operating System. It is based on Linux Kernel. This Linux kernel was firstly released by Linus Torvalds at 17 September 1991. There are different distributions of Linux, some of these are:
- Red Hat
- Ubuntu
- Fedora
- Debian
- Suse etc.
All these Linux versions uses the same Linux commands and all the Basic Linux commands are similar in these Operating Systems. Linux find command, Linux delete command, Linux add user, Linuc copy file, Linux password change, Linux unzip etc. All these commands are similar in these versions. So, you can use Linux Cheat Sheet Commands on all these Linux distributions. In other words, you can benefit Linux command line cheat sheet on Red Hat, Ubuntu, Fedora, Debian, Suse etc.
Basic Linux Commands
There are thousands of commands in Linux. But some of these Linux commands are used very often. We can say these Linux commands, Basic Linux commands. So, what are the Linux Basic Commands? These basic commands are the ones, that Network engineers, System Administrators use almost everyday or very often. Some of the jobs used with these commands are given below:
- linux remove directory
- linux delete directory
- linux delete file
- Linux password change
- Linux unzip
- linux copy directory
- linux add user to gorup
- linux add user
- linux copy file
- linux list users
- linux search file etc.
- linux user list
- linux traceroute
- linux grep
- linux create user
- linux create file
- linux move file etc.
So, in this Linux Cheat Sheet, you can find all these Basic Linux Commands beside the other important Linux Commands. So, Linux Cheat Sheets Commands will help you both on your daily routine system administration activities and other operational activities.
Linux Cheat Sheet Commands pdf
As the other Cheat Sheets on IPCisco.com, you can also download Linux cheat sheet commands in pdf format. You can both check these Linux commands onthis page and you can download to use offline in any other platform. So, Linux Cheat Sheet pdf is for you. YOu can use it and share with your friends to use also on their Linux activities.
If You Like, Kindly Share
If you find this page useful for your Linux works and if you like it, kindly share this page with your friends, with your colleagues, with your social media followers etc. Whoever you share this knowledge, this will help us to develop better cheat sheets.
You can share this page in your social media accounts like facebook, linkedin, twitter etc., in related network and programming forums, in your blogs, in any of your accounts. If you share this page, this page will help another network, programming fan and it eases his/her work. So, if you would like to help others, kindly share this page.
Do not forget, Knowledge Increases by Sharing.
love it, it’s amazing
Nice to hear this Bol:) Enjoy!
thanks I like it
Always welcome Willie ;) Enjoy!
Thanks.
Always welcome Serghei ;)
thanks so much. Very good.
Where can I download this cheat sheet.? Any link?
Always welcome Santosh ;) You can download it on this page by clicking the download picture.
Well Done
Thank you;) Enjoy!
Thanks!!! this will help the people out alot.
I also like how you set everything up, for as breaking down the categories.
Thank you very much Andre:) Enjoy!;)
This is an amazing contribution for everyone in Linux world.
Thanks a lot
Always welcome Ely :) Good luck!
Thanks
Welcome Bianka;)