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Top Forums Shell Programming and Scripting How to remove all lines with something other than numbers Post 302089961 by Juha on Thursday 21st of September 2006 04:29:28 PM
Old 09-21-2006
How to remove all lines with something other than numbers

Hi,

How would I get rid of lines having something else than numbers (such as tabs,white space, special characters, empty line, letters).

So I have big file with numers as follows:

12345678901
23456789012
32343678901
42345638901
52345678901

and I sometimes the file might contain some stuff not belonging there.

So if someone could help me with some nice one-liner to remove all lines that does not follow the format I want: 11 numbers and nothing else.

Thanks,
//Juha
 

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COLCRT(1)						      General Commands Manual							 COLCRT(1)

NAME
colcrt - filter nroff output for CRT previewing SYNOPSIS
colcrt [ - ] [ -2 ] [ file ... ] DESCRIPTION
Colcrt provides virtual half-line and reverse line feed sequences for terminals without such capability, and on which overstriking is destructive. Half-line characters and underlining (changed to dashing `-') are placed on new lines in between the normal output lines. The optional - suppresses all underlining. It is especially useful for previewing allboxed tables from tbl(1). The option -2 causes all half-lines to be printed, effectively double spacing the output. Normally, a minimal space output format is used which will suppress empty lines. The program never suppresses two consecutive empty lines, however. The -2 option is useful for sending output to the line printer when the output contains superscripts and subscripts which would otherwise be invisible. A typical use of colcrt would be tbl exum2.n | nroff -ms | colcrt - | more SEE ALSO
nroff/troff(1), col(1), more(1), ul(1) BUGS
Should fold underlines onto blanks even with the `-' option so that a true underline character would show; if we did this, however, colcrt wouldn't get rid of cu'd underlining completely. Can't back up more than 102 lines. General overstriking is lost; as a special case `|' overstruck with `-' or underline becomes `+'. Lines are trimmed to 132 characters. Some provision should be made for processing superscripts and subscripts in documents which are already double-spaced. 3rd Berkeley Distribution May 7, 1986 COLCRT(1)
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