basic linux command set

• egrep [^letter]
• ^ means after that letter all lines are highlighted
• egrep[letter$]
• $ means before that letter all lines are highlighted
• egrep[^letter$]
• inbetween letters are highlightedr
• -p stands for parent directory it will create folder in home elpthat set
• if u not use  -p it will not create folder at home by default
• rm is used to delete only files not whole folder
• rm -rf is used to remove directory recursively without  asking permission