I need help in writing a script that will modify one word of text in my users .cshrc file. Here's what the line looks like now: setenv NNTPSERVER oldserver, and I need to find a way to make it look like setenv NNTPSERVER newserver. I know I can vi every file to make the necessary changes, but I have over 200 accounts, and that would take a while. Thanks for any help you can provide.
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For best practise, the sed should write to another file, rather than overwriting the original, as sometimes this can 0 the file. so
sed -e 's/setenv NNTPSERVER oldserver/setenv NNTPSERVER newserver/' .cshrc >.cshrc
should be
sed -e 's/setenv NNTPSERVER oldserver/setenv NNTPSERVER newserver/' .cshrc >.cshrc.tmp
mv .cshrc.tmp .cshrc
hmmm -I read that too fast. After looking at the fi problem again, actually I would suggest that the "; then" would still work, but it's not a clear description of that problem. I think because there is no "; then", it executes the copy, then exits the if automatically, so when it hits the fi after the sed, it's like "hey I don't need you, I'm done with my if." -Also, if it exits the if after the copy, no matter what, it's going to try and sed/edit the file & save it, so if the file didn't exist, the script would still bomb?
Food for thought...
JW
This ended up working great, thanks for all who responded.
Something like
#!/usr/bin/ksh
for USER in `cat /etc/passwd | awk -F: '{ print $1 }'`
do
# cd to each home directory in turn
cd ~$USER
# Make a backup of the cshrc if it exists - just in case
if [[ -f .cshrc ]]; then
cp -p .cshrc .cshrc.save
# edit it using stream editor
sed -e 's/setenv NNTPSERVER oldserver/setenv NNTPSERVER newserver/' .cshrc >.cshrc
fi
done
- Try it out with a couple first before running the script i.e for USER in 'adam joe'
SD
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by: soupdragonPosted on 2003-03-18 at 05:31:25ID: 8158841
Something like
#!/usr/bin/ksh
for USER in `cat /etc/passwd | awk -F: '{ print $1 }'`
do
# cd to each home directory in turn
cd ~$USER
# Make a backup of the cshrc if it exists - just in case
if [ -f .cshrc ]
cp -p .cshrc .cshrc.save
# edit it using stream editor
sed -e 's/setenv NNTPSERVER oldserver/setenv NNTPSERVER newserver/' .cshrc >.cshrc
fi
done
- Try it out with a couple first before running the script i.e for USER in 'adam joe'
SD