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Shell Programming and Scripting

change in file requires

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# 1  
Old 09-18-2008
change in file requires
Hi,

i have one file, filename -> a.txt, i want that simple way just enter command and it will do that, not through redirection way.


AAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFF

i want to disable line2 like

#BBBBBBBBBBBBBBBBBBBBBBB

and wants to add another line after line4 [ZZZZZZZZZZZZZZZZZZ] so output shows like that.



AAAAAAAAAAAAAAAAAAAAAAA
#BBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDD
ZZZZZZZZZZZZZZZZZZZZZZZ
EEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFF

Thanks,
Bash
# 2  
Old 09-18-2008
Code:
awk -v newline="ZZZZZZZZZZZZZZZZZZ" '
NR == 2 { printf "#" } 1
NR == 4 { print newline }' FILENAME

# 3  
Old 09-18-2008
its not doing anything.

Thanks,
bash
# 4  
Old 09-18-2008
try this....
Quote:
awk '{if(NR==2)print "#"$0; else if(NR==4)print "ZZZZZZZZZZZZZZZZZZZZZZZ\n"$0; else print $0}' filename
# 5  
Old 09-18-2008
this is displaying only, i want i just press enter it will do both change, as my main motive is no redirection method.

Thanks,
bash
# 6  
Old 09-18-2008
Quote:
Originally Posted by learnbash
its not doing anything.

Sure it is. What do you want it to do?

If you want it to change the file, redirect the output to a new file then copy or move it over the original file.
# 7  
Old 09-18-2008
yes, i sure.

my question is
__________________________

Hi,

i have one file, filename -> a.txt, i want that simple way just enter command and it will do that, not through redirection way.


AAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFF

i want to disable line2 like

#BBBBBBBBBBBBBBBBBBBBBBB

and wants to add another line after line4 [ZZZZZZZZZZZZZZZZZZ] so output shows like that.



AAAAAAAAAAAAAAAAAAAAAAA
#BBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDD
ZZZZZZZZZZZZZZZZZZZZZZZ
EEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFF
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