Linux Commands

cd > changing directory

ls > seeing list

clear > clearing terminal screen

cd -  >   backing a from directory
cd ..  >  backing from a directory

cd ~   > jump to the home directory

mkdir  > making or creating new folder

rmdir  > removing or deleting a directory

mv > renaming a folder or file

touch  > creating a new file

rm  > removing a file

pwd > Shows the working directory name with path

(cat >file1.txt ) > Creating new file with contents
ctrl+z > (to exit from editor of consents)

gedit fileName.extension  > for opening a specific file

ls b* > show the file list that starts with b and then one or more character

ls *l* > shows characters that has before and after some character before and after 'l'

ls ?l* > Shows the list that has 1 character before 'l' and one or more character after 'l'

ls [rt]*  > Shows the list that starts with 'r' and 't'

ls *[0-9]*    > Shows the list that contains numeric number (0-9)

ls [^a-k]*    > Shows the list that does not starts with "a" to "k".

head -4 ba.txt > shows the first 4 list from the file named ba.txt

tail -3 ba.txt > shows the last 3 list from the file named ba.txt

sort ba.txt > sort the contents alphabetically

nl ba.txt  > Shows the line number of the contents of the file