Basic sed replace question

Hello,

I have a .htaccess file as follows... No I want to comment the last line ( in this case.. it may not be a last line for other cases).. please advise how to add a # (comment infront of "Options All -Indexes" not assuming this line to be the last line using sed.

root@server1 [/home/name/public_html]# cat .htaccess
# -FrontPage-

IndexIgnore .htaccess */.??* ~ # */HEADER */README */_vti*

<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>

Options All -Indexes
root@server1 [/home/name/public_html]#

Result should be like
------------------------

root@server1 [/home/name/public_html]# cat .htaccess
# -FrontPage-

IndexIgnore .htaccess */.??* ~ # */HEADER */README */_vti*

<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>

#Options All -Indexes
root@server1 [/home/name/public_html]#

Please advise.

Thanks.

sed 's/Options All -Indexes/#Options All -Indexes/' filename

assuming single occurrence of pattern
else use /g

Thanks... works beautifully.

How about say.. I have some 50 files in a folder... which are actually valiases files.. where the catch all or default address is set as ....

*: username for a domain... xyz.com

*: username1 for a domain... abc.com

I.e.

if you do ..

cat /etc/valiases/xyz.com
*: username

cat /etc/valiases/abc.com
*: username1

cat /etc/valiases/def.com
*: username2

Now.. i want to replace all instances of ..

*: username2 or *: username or *: username1 to

*: :fail: No Such Address Here

So after conversion..

cat /etc/valiases/def.com
*: :fail: No Such Address Here

same for other domains..

Can you please advise.

Thanks.

perl -i -ne ' print "*: :fail: No Such Address Here\n" if( /^\*:/ ) ' /etc/valiases/*.com

sed 's/\*: username.*/\*: :fail: No Such Address Here/' file

Hello,

Its working.. but it prints the output.. how can I make a script so that it changes the line automatically.

root@dallas [/opt/abc]# sed 's/\: username.*/\: :fail: No Such Address Here/g' *
*: :fail: No Such Address Here
*: :fail: No Such Address Here
*: :fail: No Such Address Here
root@dallas [/opt/abc]# cat abc.com
*: username1

root@dallas [/opt/abc]# ls
./ ../ abc.com def.com xyz.com
root@dallas [/opt/abc]#

This doesnot seem to be working.
-------------------------------------
root@dallas [/opt/abc]# perl -i -ne ' print ": :fail: No Such Address Here\n" if( /^\ ) ' /etc/valiases/*.com
root@dallas [/opt/abc]# cat abc.com
*: username1

This command has changed files in /etc/valiases directory. In which directory are you checking the files?

Ok..

Thanks a lot to both of you.

Its working now

root@dallas [/opt/abc]# perl -i -ne ' print ": :fail: No Such Address Here\n" if( /^\ ) ' /opt/abc/*.com
root@dallas [/opt/abc]# cat *
*: :fail: No Such Address Here
*: :fail: No Such Address Here
*: :fail: No Such Address Here

In case of files with any suffix,

root@dallas [/opt/abc]# perl -i -ne ' print ": :fail: No Such Address Here\n" if( /^\ ) ' /opt/abc/*
root@dallas [/opt/abc]# cat *
*: :fail: No Such Address Here
*: :fail: No Such Address Here
*: :fail: No Such Address Here
root@dallas [/opt/abc]#

However I would love to use sed.

for file in /opt/abc/*
do
sed 's/\*: username.*/\*: :fail: No Such Address Here/g' "$file" > tmp
mv tmp "$file"
done

root@dallas [/opt/abc]# cat /root/x
for file in /opt/abc/*
do
sed 's/\: username.*/\: :fail: No Such Address Here/g' "$file" > tmp
mv tmp "$file"
done
root@dallas [/opt/abc]#
root@dallas [/opt/abc]# cat abc.com
*: ddde
root@dallas [/opt/abc]#
root@dallas [/opt/abc]# cat def.com
*: asdsadas
root@dallas [/opt/abc]#
root@dallas [/opt/abc]# cat xyz.com
*: srfasdrdsaf
root@dallas [/opt/abc]#
root@dallas [/opt/abc]# /root/x
root@dallas [/opt/abc]# cat *
*: ddde
*: asdsadas
*: srfasdrdsaf
root@dallas [/opt/abc]#

suggest its now working.

command I posted will give the modified version of the source file.

to effect the changes use GNU sed
or
do it has,

sed command > temp
mv temp orig

Interesting results
----------------------------
root@dallas [/opt/abc]# cat *
*: ddde
: asdsadas
: srfasdrdsaf
root@dallas [/opt/abc]# sed 's/\: */\: :fail: No Such Address Here/' abc.com
*: :fail: No Such Address Hereddde
root@dallas [/opt/abc]#

root@dallas [/opt/abc]# cat abc.com
*: ddde

root@dallas [/opt/abc]# sed 's/\: */\: :fail: No Such Address Here/' abc.com > temp ; mv -f temp abc.com
root@dallas [/opt/abc]# cat abc.com
*: :fail: No Such Address Hereddde
root@dallas [/opt/abc]#

so it adds ddde at the end after "No Such Address Here"

Dangerous.........

It wipes out other forwarders..

say..

s@y.com : a@b.com
*: username

After running the perl command...

it leaves only.

*: :fail: No Such User Here.