Basic Linux commands

lsLists all files and directories in the present working directory
ls-RLists files in sub-directories as well
ls-aLists hidden files as well
ls-alLists files and directories with detailed information like permissions,size, owner, etc.
cd or cd ~Navigate to HOME directory
cd ..Move one level up
cdTo change to a particular directory
cd /Move to the root directory
cat > filenameCreates a new file
cat filenameDisplays the file content
cat file1 file2 > file3Joins 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_nameRenames the file to a new filename
sudoAllows regular users to run programs with the security privileges of the superuser or root
rm filenameDeletes a file
manGives help information on a command
historyGives a list of all past commands typed in the current terminal session
clearClears the terminal
mkdir directorynameCreates a new directory in the present working directory or a at the specified path
rmdirDeletes a directory
mvRenames a directory
pr -xDivides the file into x columns
pr -hAssigns a header to the file
pr -nDenotes the file with Line Numbers
lp -nc , lpr cPrints “c” copies of the File
 lp-d lp-PSpecifies name of the printer
apt-getCommand 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 < FilenameCommand to send email with attachment

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