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Linux bash script to change a string if another string exists in file

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http://stackoverflow.com – I need a linux bash script to loop a folder for all files and check if there is a string in them, change another string of them. For example we check if file contanis AAAA then replace BBBB with CCCC and if didn't have AAAA we change DDDD to EEEE. I wrote some codes but I'm not sure if they work correctly: #!/bin/bash PATH = /path/to/files/* # files has no extension for file in $PATH; do if grep -q "AAAA" $file; then replace "BBBB" "CCCC" -- $file else replace "DDDD" "EEEE" -- $file fi done (HowTos)

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Submitted by fooubuntu on 12/17/2012

Stories similar to Linux bash script to change a string if another string exists in file

I have very big logs (several gigabytes per day), that can (but do not need to) contain specific lines. I have to count the number of occurences of every one of these lines on a daily basis.

I have a file patterns.in, that contains the desired lines.

sed replace? 33 weeks 1 day ago

Hello. I have this file:

XXXX 1 AAAA 2 BBBB 3 CCCC 4 DDDD YYYY 1 AAAA 2 BBBB 3 CCCC 4 DDDD

Desired output:

XXXX AAAA XXXX BBBB XXXX CCCC XXXX DDDD YYYY AAAA YYYY BBBB YYYY CCCC YYYY DDDD

Any help would be appreciated.

I am new at shell script. I have a file containing some records like this:

aaaa,-1,0 bbbb,2,3 cccc,-5,-10 dddd,0,100

I want to write a script that will make the list look like this:

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Adding column values in a file 18 weeks 6 days ago

Hi,

I am having a file in the following format.

I have the following folder structure:

/AAAA/BBBB/1111 /AAAA/BBBB/2222 /AAAA/BBBB /AAAA/CCCC /AAAA/DDDD/3333 /AAAA/DDDD /AAAA

I want to get the size of these folders, but just from the folders and subfolders. I dont't need the sub-subfolders, which in my example are 1111, 2222 and 3333.

I can do that with "du -m", but it shows me the entire tree, not just 2 levels as I need.

I have this bash:

replace="s/AAAA/BBBB/g"; find myDirectory/. -type f -print0 | xargs -0 sed -i $replace;

that will recursively scan myDirectory tree and replace all occurrences of AAAA with BBBB on the files there.

But I want to limit this to happen on files of specific extensions, for example, .txt, .read, .po

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I have output from a foreach loop in the form:

ABC123603LP 44Bq AAAA ABC123603P 3BU AAAA ABC123603ZZP AAAA ABC123604DP 3BU BBBB ABC123604LP 44Bq BBBB ABC123605AP 4q CCCC ABC123605DP 33BGU CCCC ABC123606AP 35Bjq DDDD ABC123606DP 4B DDDD

From this I wish to print columns 1 and 2 to the term

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Hello. I have a file of text with columns:

Code: aaaa bbbb ccc dddd aaaa bbbb ccc dddd aaaa bbbb ccc dddd How can this be converted to a .csv file?

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Having a file of the following contents:

1111,2222,3333,4444 aaaa,bbbb,cccc,dddd

I seek to get a file equal to the original but lacking a n-th column like, for n = 2 (or may it be 3)

1111,2222,4444 aaaa,bbbb,dddd

or, for n = 0 (or may it be 1)

2222,3333,4444 bbbb,cccc,dddd

A real file can be gigabytes long having tens thousands columns.

As always in such cases, I suspect command line mag