Linux Tutorial – Ls command options

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LInux

This chapter explains Introduction to Ls command options, Combining command options

Ls command options

ls ­a
This will list all the files in your  current working directories including  hidden files that start with .
ls ­l
That’s a long listing that we saw  before, It shows many important  information about a file.  Permissions, Number of  Links,Owner,Group,File size,Modification  Date,File name
ls ­t This will list the files sorted by  modification date. Newest first 
ls ­r This will list the files in reversed  fashion.
ls ­i
This will list the index node number of  each file in the current working  directory

Combining command options

● What if you want to list all the files including hidden files on your system ?

● You can just combine the ­a option with the ­R option as follows.

● ls ­R ­a 

● An easier way is ls ­Ra  The order doesn’t matter and so ls ­a ­R and ls ­aR will have the same results.

● Now ls ­Ra / will list all the files on your system, It will take long time !

● Now ls ­latR / will make a long listing of all the files on your system sorted  by modification date (newest first).

● Becareful, The command options are case senstive, ls ­R (Recusrive) is not the  same as ls ­r (reverse listing)

● If you want to list the files in reverse order based on time Then we can combine ­r and ­t so , ls ­tr will list the files sorted by  modification date (Oldest first)

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