Category: Linux Basics

All the directories in the Linux system come under the root(/) directory which is represented by a forward slash (/).   Directory type Types of

Filetype + users permission Index / links owner user size date time File name – rw-rw-r– 1 opc opc 0  Sep  5 02:31 file2  

1 Create user – w/o password login as root user useradd <username> 2 Create user – w/o password – as normal user with sudo sudo

1 Current logged in username whoami 2 All users logged in to system who 3 To find user id  id  4 To see logged in

-rw-rw-r–. 1 opc opc    0 Sep  5 02:31 file2 Filetype + users permission Index / links owner user size date time File name –

1 Listing directories ls 2 Long listing ll 3 Listing with hidden/all  ls -a  4 Long with hidden file ll -a 5 Listing with human

1 Creating Directory/Folder mkdir <folder-name> 2 Removing Directory rmdir <directory/folder name> 3 To know present directory pwd 4 Moving  directory / Cut mv <old-dir> <new-dir>

1 To Read File cat <filename> 2 To Read Top 5 lines head -5 <filename> 3 To Read bottom 6 lined tail -6 <filename> 4