remove sections from each line of files
cut [OPTION]... [FILE]...
-b, --bytes=LIST select only these bytes -c, --characters=LIST select only these characters -d, --delimiter=DELIM use DELIM instead of TAB for field delimiter -f, --fields=LIST select only these fields; also print any line that contains no delimiter character, unless the -s option is specified -n with -b: don’t split multibyte characters --complement complement the set of selected bytes, characters or fields -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter the default is to use the input delimiter Use one, and only one of -b, -c or -f. Each LIST is made up of one range, or many ranges separated by commas. Selected input is written in the same order that it is read, and is written exactly once. Each range is one of: N N’th byte, character or field, counted from 1 N- from N’th byte, character or field, to end of line N-M from N’th to M’th (included) byte, character or field -M from first to M’th (included) byte, character or field
[eleiss@eleiss ~]$ cat /etc/passwd | cut -d":" -f 1,7 root:/bin/bash bin:/sbin/nologin daemon:/sbin/nologin adm:/sbin/nologin lp:/sbin/nologin [eleiss@eleiss ~]$
In this example ":" is provided as a delimiter to the cut command. As you may know, a password file in Linux is a seven fields file where every field is separated by ":"cut command is one the most used commands in shell scripts.
[eleiss@eleiss ~]$ ls -l total 24068 -rw-------. 1 eleiss eleiss 14653 Feb 3 2011 autosave.xmi drwxr-xr-x. 2 eleiss eleiss 4096 Jun 30 17:33 Desktop drwxr-xr-x. 2 eleiss eleiss 4096 Apr 25 00:36 Documents drwxrwxr-x. 3 eleiss eleiss 4096 Sep 4 19:46 empty drwxr-xr-x. 2 eleiss eleiss 4096 Aug 5 2010 Music -rw-rw-r--. 1 eleiss eleiss 24539234 Aug 12 2010 out.ogv drwxr-xr-x. 2 eleiss eleiss 4096 Aug 7 2010 Pictures -rw-rw-r--. 1 eleiss eleiss 618 Aug 11 2010 texput.log drwx------. 2 eleiss eleiss 4096 May 17 23:31 VGAME [eleiss@eleiss ~]$ ls -l | tail -n +2 | cut -b 1-10 -rw------- drwxr-xr-x drwxr-xr-x drwxrwxr-x drwxr-xr-x -rw-rw-r-- drwxr-xr-x -rw-rw-r-- drwx------ [eleiss@eleiss ~]$
tail command eliminates the first line from the output of ls -l command. As you know that the first ten characters of the output are the file type and permissions. The cut command extracts first ten characters from each line.
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