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Old 12-31-2007, 03:30 PM   #1
vonedaddy
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Run command against text file


I recently copied my data over to my linux box from my windows box. I have all these Thumbs.db files all over the place now.

So I did this:

find / -name Thumbs.db > thumbs.txt

Now I have a text file with the location of every Thumbs.db file. Now I want to delete all those files, how can I run an rm command against the entries in this file?
 
Old 12-31-2007, 03:43 PM   #2
kiley_rodgers
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find / -name Thumbs.db -exec rm {} \;



you can also do
find / -name Thumbs.db -exec rm -i {} \;
if you would ilke it to ask for confirmation for each deletion.... change filename as needed.....
 
Old 12-31-2007, 03:44 PM   #3
vonedaddy
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Quote:
Originally Posted by kiley_rodgers View Post
find / -name Thumbs.db -exec rm {} \;



you can also do
find / -name Thumbs.db -exec rm -i {} \;
if you would ilke it to ask for confirmation for each deletion.... change filename as needed.....


Thats also some great info, but just for kicks, lets say I wanted to run it against the file I have already?
 
Old 12-31-2007, 04:18 PM   #4
David the H.
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Use a simple 'for' loop:

for f in $(cat thumbs.txt); do rm $f; done

This reads the contents of thumbs.txt (use '$()' to get the output of a command, 'cat' in this case) one line at a time into variable f, then runs the rm command on the contents of the variable ($f), and loops back to do the next line.


I suggest you remember the 'for' loop syntax. It's probably the most useful bash command you can learn.
 
Old 12-31-2007, 05:43 PM   #5
vonedaddy
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Quote:
Originally Posted by David the H. View Post
Use a simple 'for' loop:

for f in $(cat thumbs.txt); do rm $f; done

This reads the contents of thumbs.txt (use '$()' to get the output of a command, 'cat' in this case) one line at a time into variable f, then runs the rm command on the contents of the variable ($f), and loops back to do the next line.


I suggest you remember the 'for' loop syntax. It's probably the most useful bash command you can learn.

This is exactly what I was looking for thank you both! I will read up on the for syntax.
Is there a man page or website I can read, something you can suggest?
 
Old 12-31-2007, 07:42 PM   #6
Tinkster
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Aye ...
man bash
Search for loops ...

Or
http://tldp.org/LDP/abs/html/index.html



Cheers,
Tink
 
Old 12-31-2007, 07:58 PM   #7
ghostdog74
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Quote:
Originally Posted by David the H. View Post
Use a simple 'for' loop:

for f in $(cat thumbs.txt); do rm $f; done
safer with this if file names have spaces
Code:
for i in "$(cat file)".....
better still, use while loop. Eliminate the use of cat
Code:
while read line
do
 # blah 
done < file
 
  


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