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Loop through multiple files in bash script


 
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# 1  
Old 04-09-2016
Loop through multiple files in bash script

Hi Everybody,

I'm a newbie to shell scripting, and I'd appreciate some help. I have a bunch of .txt files that have some unwanted content. I want to remove lines 1-3 and 1028-1098.

Code:
#!/bin/bash

for '*.txt' in <path to folder>
do
sed '1,3 d' "$f";
sed '1028,1098 d' "$f";

done

I know my first line is incorrect...How do I loop through all of these text files?

Thanks!!

Moderator's Comments:
Mod Comment Please use code tags as required by forum rules!

Last edited by RudiC; 04-10-2016 at 02:18 AM.. Reason: Added code tags
# 2  
Old 04-10-2016
The for loop...

Your for loop is a bit wonky in the first line. I suggest reading up a bit before trying stuff on system files.

The general form is
Code:
for VARIABLE  in list-of-possibilities

So, for your requirement, it would be
Code:
for FILE in /some/path/*.txt
do
  # some operation using $FILE 
  # some more with $FILE 
done

Cheers and happy reading!
# 3  
Old 04-10-2016
You probably want to save your changes, and mayhap back to the original file? Make it
Code:
sed '...' "$f" >TMP && mv TMP "$f"

, then.
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