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Top Forums Shell Programming and Scripting Search a file column wise and delete it Post 302416037 by gotam on Saturday 24th of April 2010 12:19:36 PM
Old 04-24-2010
Search a file column wise and delete it

i have a file which has a column that is unique
i am intending to serach it and if it is there to remove the row.

the file looks like
Code:
ROLLNO,NAME   ,SUB1,SUB2,SUB3,TOTAL,PERCENTAGE,RESULT
15     ,rig   ,34  ,56  ,87  ,177  ,59 %         ,PASS
23     ,wel   ,45  ,76  ,56  ,177  ,59 %         ,PASS
24     ,rew   ,23  ,45  ,67  ,135  ,45 %       ,THIRD

if i need to remove the row with a roll num
i have tried with
Code:
 
cut -f1 -d "," studentrec.txt | sed '/"$rollno"/d'
even with 
 cut -f1 -d "," studentrec.txt | sed '/"$rollno"/{d;}'

but still unable to get the required result

plz help

edit by scottn: double post. continued here

Last edited by Scott; 04-24-2010 at 01:41 PM.. Reason: Code tags, please...
 

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cdk_position(3) 					     Library Functions Manual						   cdk_position(3)

NAME
cdk_position - curses widget positioning key-bindings SYNOPSIS
Position methods for the Cdk widgets allow the user to move the widget around the screen via the cursor/keypad keys. DESCRIPTION
The following key bindings can be used to move the widget around the screen. +---------------------------------------------------------------+ |Key Action | +---------------------------------------------------------------+ |Up Arrow Moves the widget up one row. | |Down Arrow Moves the widget down one row. | |Left Arrow Moves the widget left one column | |Right Arrow Moves the widget right one column | |1 Moves the widget down one row and left one | | column. | |2 Moves the widget down one row. | |3 Moves the widget down one row and right one | | column. | |4 Moves the widget left one column | |5 Centers the widget both vertically and hori- | | zontally. | |6 Moves the widget right one column | |7 Moves the widget up one row and left one | | column. | |8 Moves the widget up one row. | |9 Moves the widget up one row and right one | | column. | |t Moves the widget to the top of the screen. | |b Moves the widget to the bottom of the | | screen. | |l Moves the widget to the left of the screen. | |r Moves the widget to the right of the screen. | |c Centers the widget between the left and | | right of the window. | |C Centers the widget between the top and bot- | | tom of the window. | |Escape Returns the widget to its original position. | |Return Exits the function and leaves the wid- | | getwhere it was. | +---------------------------------------------------------------+ +---------------------------------------------------------------+ The numbers 0-9 are chosen to correspond to the numeric keypad on your terminal. Cdk does not handle the application mode keypad control sequences, since those are not defined via terminfo. To use the numeric keypad you should ensure that it is in normal (or NumLock) mode. SEE ALSO
cdk(3), cdk_binding(3), cdk_display(3), cdk_screen(3) cdk_position(3)
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