cp = cp file3.txt file4.txt (copy a file or directory) { syntax – cp <source_file><destination>
mv = mv (which file to move) path name (where to move)
cd = change to directory
touch = create Empty file
cat> filename = create new file and write a content, combining file
{ syntax – cat (file1) (file2) > (file3) }
cat = display content
tac = Display content lines in reverse
grep = Filter to search given pattern in file content
ping = check the connectivity status of server
diff = compare the content of two different file
hostname = display hostname
hostname -i = display host ip
chmod = give permission
uniq = Remove duplicate of file content/ it can remove only continuous duplicate
find = find (syntax — find <foldername>/ -name <filename> )
gzip = gzip <filename> {for zip the file}
tar = For merge the file (syntax — tar cvf <newfilename.tar> filename1 filename2)