This tutorial explains Linux “rev” command, options and its usage with examples.
rev – reverse lines of a file
Description :
rev copies the specified files to the standard output and reverses the order of characters in every line.
If no files are specified, the standard input is read.
Usage :
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rev [file]
Example :
Given a file abc.txt containing output of an ll command. Using rev utility, the reversed output is shown :
$ cat abc.txt total 64 -rw-rw-r-- 1 abc abc 4096 Dec 20 06:23 abc -rw-rw-r-- 1 abc abc 4 Dec 22 08:37 abv drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Desktop drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Documents drwxr-xr-x 2 abc abc 4096 Dec 10 19:16 Downloads -rw-r--r-- 1 abc abc 8942 Nov 8 05:24 examples.desktop -rw-rw-r-- 1 abc abc 12 Dec 21 09:07 file1.txt -rw-rw-r-- 1 abc abc 12 Dec 21 09:07 file2.txt drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Music drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Pictures drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Public drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Templates drwxrwxr-x 2 abc abc 4096 Dec 24 10:51 Ubuntu One drwxr-xr-x 2 abc abc 4096 Nov 8 05:32 Videos $ rev abc.txt 46 latot cba 32:60 02 ceD 6904 cba cba 1 --r-wr-wr- vba 73:80 22 ceD 4 cba cba 1 --r-wr-wr- potkseD 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd stnemucoD 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd sdaolnwoD 61:91 01 ceD 6904 cba cba 2 x-rx-rxwrd potksed.selpmaxe 42:50 8 voN 2498 cba cba 1 --r--r-wr- txt.1elif 70:90 12 ceD 21 cba cba 1 --r-wr-wr- txt.2elif 70:90 12 ceD 21 cba cba 1 --r-wr-wr- cisuM 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd serutciP 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd cilbuP 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd setalpmeT 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd enO utnubU 15:01 42 ceD 6904 cba cba 2 x-rxwrxwrd soediV 23:50 8 voN 6904 cba cba 2 x-rx-rxwrd
Sanfoundry Global Education & Learning Series – 1000 Linux Tutorials.
If you wish to look at all Linux commands and their usage examples, go to Linux Commands Tutorial.
If you find any mistake above, kindly email to [email protected]Related Posts:
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