search a file for a word

paul_mat · 04-13-2006, 09:45 PM

hi there,

i'm looking for a command that will search in a file for the first instance of a word and then place another word on top of that word.

for instance, search this file for the word dog and then put cat on top

fish
horse
cow
bull
dog
dog
dog
dog

turns into

fish
horse
cow
bull
cat
dog
dog
dog
dog

allelopath · 04-13-2006, 11:11 PM

I don't know how to do this.
This might get you going.
This command will find all instances of "dog" in files:

cat * | grep dog

homey · 04-13-2006, 11:40 PM

Using -m1 with grep tells it to stop looking after the first match. So, this might work for you....

Code:

#!/bin/bash

a=$(grep -m1 -n "dog" < file.txt | cut -d: -f1)
sed -i ''$a's/dog/cat/' file.txt

paul_mat · 04-14-2006, 10:17 PM

thanks homey that looks just like want i want, but i need to be able to use multiable lines. this is what i want to do.

a=$(grep -m1 -n "#Recommended minimum configuration:" < $A | cut -d: -f1)
sed -i ''$a's/#Recommended minimum configuration:/
#Recommended minimum configuration:
#Added by Server Setup Script
auth_param basic program
/usr/lib/squid/pam_auth
acl pam proxy_auth REQUIRED
http_access allow pam
#Added by Server Setup Script/' $A

but it wont let me, it gives me this error message

sed: -e expression #1, char 42: unterminated `s' command

homey · 04-14-2006, 10:24 PM

I looks like you have special characters in there. If so, they need to have a \ ( backslash ) in front.
For example:

Code:

sed -i ''$a's/\#Recommended minimum configuration\:/'

Also, note: ''$a is two single quotes ( ' ) and not a double quote ( " )

paul_mat · 04-14-2006, 10:48 PM

i figured it out

a=$(grep -m1 -n "#Recommended minimum configuration:" < $A | cut -d: -f1)
sed -i ''$a's/#Recommended minimum configuration:/\
#Recommended minimum configuration:\
#Added by Server Setup Script\
auth_param basic program\
$B\
acl pam proxy_auth REQUIRED\
http_access allow pam\
#Added by Server Setup Script/' $A

paul_mat · 04-14-2006, 11:07 PM

well i've kinda got it working ... this is my script so far

/usr/bin/clear

echo "
***********************************************************************************
**************************Setup squid.conf File************************************
***********************************************************************************"
echo ""

A=/etc/squid/squid.conf
echo "Enter the path to the squid.conf file:"
printf "default path is = $A: "
read A
if [ "$A" = "" ]; then
A=/etc/squid/squid.conf
fi
echo ""

B=/usr/lib/squid/pam_auth
echo "Enter the path to the squid.conf file:"
printf "default path is = $B: "
read B
if [ "$B" = "" ]; then
B=/usr/lib/squid/pam_auth
fi
echo ""

a=$(grep -m1 -n "#Recommended minimum configuration:" < $A | cut -d: -f1)
sed -i ''$a's/#Recommended minimum configuration:/\
#Recommended minimum configuration:\
#Added by Server Setup Script\
auth_param basic program\
$B\
acl pam proxy_auth REQUIRED\
http_access allow pam\
#Added by Server Setup Script/' $A

and the problem now is in my /etc/squid/squid.conf file this comes out

#Added by Server Setup Script
auth_param basic program
$B
acl pam proxy_auth REQUIRED
http_access allow pam
#Added by Server Setup Script

it doesn't seam to output the variable, can you tell me how to do that?

homey · 04-14-2006, 11:38 PM

I think I would do something like this...

Code:

echo "Enter the path to the squid.conf file:"
read -p "default path is /etc/squid/squid.conf : " info

if [ "$info" = "" ]; then
A=/etc/squid/squid.conf
#echo A=$A
else
A=$info
#echo A=$A
fi

paul_mat · 04-15-2006, 12:26 AM

um, maybe i miss said what i was wanting ... the $A variable is fine, it's the $B variable that ends up in the squid.conf as '$B' instead of '/usr/lib/squid/pam_auth'

homey · 04-15-2006, 07:50 AM

Same idea for B

Code:

echo "Enter the path to the pam_auth file:"
read -p "default path is /usr/lib/squid/pam_auth : " pam_info

if [ "$pam_info" = "" ]; then
B=/usr/lib/squid/pam_auth
#echo B=$B
else
B=$pam_info
#echo B=$B
fi

paul_mat · 04-15-2006, 10:23 AM

i'm sorry but i still don't understand, what do i put in this part of the script

a=$(grep -m1 -n "#Recommended minimum configuration:" < $A | cut -d: -f1)
sed -i ''$a's/#Recommended minimum configuration:/\
#Recommended minimum configuration:\
#Added by Server Setup Script\
auth_param basic program\
$B\
acl pam proxy_auth REQUIRED\
http_access allow pam\
#Added by Server Setup Script/' $A

$B or $pam_info?

homey · 04-15-2006, 10:30 AM

Quote:

$B or $pam_info?

Use $B which will be the default /usr/lib/squid/pam_auth if the user presses enter at the prompt....
echo "Enter the path to the pam_auth file:"
read -p "default path is /usr/lib/squid/pam_auth : " pam_info

If the user types in another path then, $B will have that value.

paul_mat · 04-16-2006, 01:59 AM

i've changed the script to this

A=/etc/squid/squid.conf
echo "Enter the path to the squid.conf file:"
printf "default path is = $A: "
read A
if [ "$A" = "" ]; then
A=/etc/squid/squid.conf
fi
echo ""

echo "Enter the path to the pam_auth file:"
read -p "default path is /usr/lib/squid/pam_auth : " pam_info

if [ "$pam_info" = "" ]; then
B=/usr/lib/squid/pam_auth
#echo B=$B
else
B=$pam_info
#echo B=$B
fi

a=$(grep -m1 -n "#Recommended minimum configuration:" < $A | cut -d: -f1)
sed -i ''$a's/#Recommended minimum configuration:/\
#Recommended minimum configuration:\
#Added by Server Setup Script\
auth_param basic program\
$B\
acl pam proxy_auth REQUIRED\
http_access allow pam\
#Added by Server Setup Script/' $A

and the /etc/squid/squid.conf file still looks like this ...

#Added by Server Setup Script
auth_param basic program
$B
acl pam proxy_auth REQUIRED
http_access allow pam
#Added by Server Setup Script