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On 18-Sep-2002/17:12 -0700, smoke <[EMAIL PROTECTED]> wrote:
>id like to append something to the beginning of each
>line on a file.
[snip]
If you want to insert it at the beginning of the line, it's "prepend", not
"append".
You want to read a list of host names from a file and prepend 'www' to
any name that does not already start with 'www'. Try this:
#!/bin/sh
for line in `cat hostlist.txt`; do
if echo $line | grep '^www' > /dev/null; then
# Line already begins with 'www'.
# Output the line to the new file as-is.
echo $line >> hostlist-www.txt
else
# Line does not begin with 'www'.
# Prepend 'www' and output the line to the new file.
echo www.$line >> hostlist-www.txt
# Increment the counter so we know how many lines were modified.
let ctr=$ctr+1
fi
done
echo "Added www to $ctr hostnames."
Tony
- --
Anthony E. Greene <mailto:[EMAIL PROTECTED]%3E>
OpenPGP Key: 0x6C94239D/7B3D BD7D 7D91 1B44 BA26 C484 A42A 60DD 6C94 239D
AOL/Yahoo Messenger: TonyG05 HomePage: <http://www.pobox.com/~agreene/>
Linux. The choice of a GNU generation <http://www.linux.org/>
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