Termainal Commands

ls
Lists all files and directories in the present working directory

ls - R
Lists files in sub-directories as well

ls - a
Lists hidden files as well

ls - al
Lists files and directories with detailed information like permissions, size, owner, etc.

cat > filename
Creates a new file

cat filename
Displays the file content

cat file1 file2 > file3
Joins two files (file1, file2) and stores the output in a new file (file3)

mv file “new file path”
Moves the files to the new location

mv filename new_file_name
Renames the file to a new filename

sudo
Allows regular users to run programs with the security privileges of the superuser or root

rm filename
Deletes a file

man
Gives help information on a command

history
Gives a list of all past commands typed in the current terminal session

clear
Clears the terminal

mkdir directoryname
Creates a new directory in the present working directory or a at the specified path

rmdir
Deletes a directory

mv
Renames a directory
pr -x Divides the file into x columns
pr -h Assigns a header to the file
pr -n Denotes the file with Line Numbers
lp -nc
lpr c Prints “c” copies of the File
lp -d lp -P Specifies name of the printer
apt-get Command used to install and update packages
mail -s ‘subject’ -c ‘cc-address’ -b ‘bcc-address’ ‘to-address’ Command to send email
mail -s “Subject” to-address < Filename Command to send email with attachment

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