In this Linux command line cheat sheet, we will learn:
Basic Linux Commands
cat Joins and displays files
cp Copies files
cpio Creates an archive, restores files from an archive, or copies a directory hierarchy
cut Selects characters or fields from input lines
dd Converts and copies a file
diff Displays the differences between two text files
emacs Editor
expand Converts TABs to SPACEs
find Finds files based on criteria
grep searches for a pattern in files
gzip Compresses or decompresses files
head Displays the beginning of a file
join Joins lines from two files based on a common field
less Displays text files, one screen at a time
ln Makes a link to a file
ls Displays information about one or more files
man Displays documentation for utilities
mkdir Creates a directory
mv Renames or moves a file
nl Numbers lines from a file
od Dumps the contents of a file
paste Joins corresponding lines from files
rm Removes a file (deletes a link)
sed Edits a file noninteractively
sort Sorts and/or merges files
split Divides a file into sections
tail Displays the last part (tail) of a file
tar Stores or retrieves files to/from an archive file
touch Creates a file or changes a file’s access and/or modification time
uniq Displays unique lines from a file
vim Editor
wc Displays the number of lines, words, and bytes in one or more files
File management user management Linx Commands
cd Changes to another working directory
chgrp Changes the group associated with a file
chmod Changes the access mode (permissions) of a file
chown Changes the owner of a file and/or the group the file is associated with
date Displays or sets the system time and date
df Displays disk space usage
dmesg Displays kernel messages
du Displays information on disk usage by directory hierarchy and/or file
finger Displays information about users
kill Terminates a process by PID
killall Terminates a process by name
nice Changes the priority of a command
nohup Runs a command that keeps running after you log out
ps Displays process status
renice Changes the priority of a process
sleep Creates a process that sleeps for a specified interval
stat Displays information about files
stty Displays or sets terminal parameters
sysctl Displays and alters kernel variables at runtime
top Dynamically displays process status
umask Specifies the file-creation permissions mask
w Displays information about local system users
which Shows where in PATH a utility is located
who Displays information about logged-in users
Programing Linux Commands
configure Configures source code automatically
gawk Searches for and processes patterns in a file
gcc Compiles C and C++ programs
make Keeps a set of programs current
mawk Searches for and processes patterns in a file
perl Scripting language
python Programming language
Job management Filesystem management Linux commands
at Executes commands at a specified time
cal Displays a calendar
crontab Maintains crontab files
diskutil Checks, modifies, and repairs local volumes
echo Displays a message
expr Evaluates an expression
fsck Checks and repairs a filesystem
mkfs Creates a filesystem on a device
screen Manages several textual windows
tee Copies standard input to standard output and one or more files
test Evaluates an expression
tr Replaces specified characters
tty Displays the terminal pathname
Process management Linux Commands
bg To send a process to the background
fg To run a stopped process in the foreground
top Details on all Active Processes
ps Give the status of processes running for a user
ps PID Gives the status of a particular process
pidof Gives the Process ID (PID) of a process
kill PID Kills a process
nice Starts a process with a given priority
renice Changes priority of an already running process
df Gives free hard disk space on your system
free Gives free RAM on your system
Shortcuts
Ctrl+C – halts the current command
Ctrl+Z – stops the current command, resume with
fg in the foreground or bg in the background
Ctrl+D – log out of current session, similar to exit
Ctrl+W – erases one word in the current line
Ctrl+U – erases the whole line
Ctrl+R – type to bring up a recent command
!! - repeats the last command
exit – log out of current session
Network
ping host – ping host and output results
whois domain – get whois information for domain
dig domain – get DNS information for domain
dig -x host – reverse lookup host
wget file – download file
wget -c file – continue a stopped download
