script help

[Michael_33]

Hi all,

There are many .txt files in /usr directory,
each file has a line with this content: 1992-2002, I want to change it to 1992-2003 by one time, how should I do? thanks.

[Wilfred Chau_1 · Accepted solution]

either vi each file, then
type ":0,$s/1992-2002/1992-2003/g

or

cp a.txt a.txt.save
sed -e "s/1992-2002/1992-2003/" a.txt.save > a.txt

[Jeff Schussele]

Hi Michael,

Assuming all .txt files in the dir need the change you can use the following sed script

for x in `ls /usr/*.txt`
>do
>sed 's/"1992-2002"/"1992-2003"/g' $x > $x.new
>done

The g (global) is required to catch all instances in the file. Without it only the first occurence gets the change

If you don't wish to keep the old copies add this after the sed command
>mv $x.new $x

HTH,
Jeff

[S.K. Chan]

Assumption made .. all of your text files are in /usr level.
# cd /usr
# for i in $(ls *.txt)
> do
> sed 's/1992-2002/1992-2003/g' $i > $i.new
> mv $i.new $i
> done
#
That should do it. Test it first by copying a few *.txt files in /tmp and run it from there.

[Michael_33]

thanks all!

[H.Merijn Brand (procura]

Just for the record, perl can do it in a single op with in-file editing:

# perl -pi -e's/1992-2002/1992-2003/g' *.txt