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linux commands list
Linux Commands
===============
man : Displays the manual of any command
cal : Displays the calendar of the current month
date : displays the current date and time
~ : home of the current user
pwd : present working directory
history :
File System
============
mkdir : make directory
mv : move/rename
cp : copy
rmdir : remove directory
ls : list all files in the current directory
-l : long listing
-a : all files (includes hidden files and folders)
-r : reverse order
-t : sorts according to user modified time
cd : change directory
.. : up one level directory
. : change to the current directory (no change, basically)
rm : remove file
-r : recursive delete
-f : force delete (ignore all the warnings)
Note: Never use "rm -rf /". It removes the whole Linux FileSystem without giving any warnings.
touch : creates a new file if does not exist or changes the modified time to current time
echo : Used to print a message to the terminal
cat : Concatenates one or more files and prints them in the terminal (by default)
printf : Used to print a message to the terminal
nano : Opens the file or creates a new file in nano editor
wc : Word Count. Prints the number of lines, words and byte count of a file
Navigation
===========
more : Used to display file but can only navigate in one direction (forward). No backward movement allowed.
less : Used to display file and it allows both forward and backward movement. This is used most often.
most : All the features of less plus some more.
head : Displays head (starting lines) of a file (by default 10 lines).
tail : Displays tail (ending lines) of a file (by default 10 lines).
file : Used to determine the type of file.
diff : Used to see differences between two files.
tee : Used to print the standard output in terminal as well as save it in a file.
grep : Global search a Regular Expression and Print.
fg : Brings all the background processes in the foreground.
which : Locate a command in FileSystem
type : displays the type of linux command
help : displays help of the command
tar : Used to create/extract tarballs
ps : Displays the snapshot of the current running processes
top : display linux processes
kill : sends kill signal to a process
du : estimate file disk usage(recursively calculates for each file in the curent directory)
fdisk
fsck
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