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how to delete a line from the file


 
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# 1  
Old 12-02-2008
how to delete a line from the file

Hi,
I have a file which contains entries with different numbers, for example:

275|24hroff|sel,fill,dbw|
2758|24hroff|sel,fill,dbw|
2765|24hroff|sel,fill,dbw|
2920|24hroff|sel,fill,dbw|

I need to delete a line which contains certian number, for instance 275
I was trying to use 'sed' but it removes all lines containing this pattern, so line with number 275 and 2758 are removed. I need to remove the exact match only. Also, number is an argument in my script. For example, PX=275
May be somebody come across a similar problem. I am in ksh88
Thanks a lot for any help -A
# 2  
Old 12-02-2008
Code:
sed '/^275\|/d' inputfilename

# 3  
Old 12-02-2008
Hammer & Screwdriver An approach with grep

Code:
> cat file90
275|24hroff|sel,fill,dbw|
2758|24hroff|sel,fill,dbw|
2765|24hroff|sel,fill,dbw|
2920|24hroff|sel,fill,dbw|
> grep -v "275|" file90
2758|24hroff|sel,fill,dbw|
2765|24hroff|sel,fill,dbw|
2920|24hroff|sel,fill,dbw|

Or, with a variable...
Note that $PX equals ${PX} ; just more explicit when other characters also in the data stream.
Code:
> PX=275
> grep -v "$PX|" file90
2758|24hroff|sel,fill,dbw|
2765|24hroff|sel,fill,dbw|
2920|24hroff|sel,fill,dbw|
> grep -v "${PX}|" file90
2758|24hroff|sel,fill,dbw|
2765|24hroff|sel,fill,dbw|
2920|24hroff|sel,fill,dbw|


Last edited by joeyg; 12-02-2008 at 02:24 PM.. Reason: Added use of variable
# 4  
Old 12-02-2008
Code:
grep -vw $var file.txt


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