11

Supposed I make a listing and sort the files by its temporal attribute:

ls -ltr

-rwxrwxrwx 1 bla bla 4096 Feb 01 20:10 foo1
-rwxrwxrwx 1 bla bla 4096 Feb 01 20:12 foo2
.
.
.
-rwxrwxrwx 1 bla bla 4096 Mar 05 13:25 foo1000

What should I add behind the ls -ltr in a pipe chain in order to obtain only the last line of the listing ? I know there are sed and awk, but I do not know how to use them, I only know what they can do.

21

Since you asked about sed specifically,

ls -ltr | sed '$!d'
  • thank you, i am now a little proud having learned some concrete sed. – Abdul Al Hazred Mar 26 '15 at 22:35
  • 3
    Also, sed -n '$p' does the same thing, but really tail -1 is the right tool for the job. – imiric Jul 9 '17 at 19:39
  • Thanks! I managed to extract the last line in /proc/cpuinfo and trim the leading zero with ease (used for extracting RPi3 serial number with ease): sed '$!d s/.*: 0\+//' /proc/cpuinfo – Yaron Jan 8 '18 at 7:40
9

You're looking for tail :

ls -ltr | tail -n 1

This will display only the last line of ls -ltr's output. You can control the number of lines by changing the value after -n; if you omit -n 1 entirely you'll get ten lines.

3

With awk:

ls -ltr | awk 'END { print }'

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