help with insert line into file

UNIX for Advanced & Expert Users
1

hi..i wanted to know is there any way to take input from the user and copy that a particular line number in a particular file

for eg . i wanted to create acl in squid at line number 2400 in squid.conf file
so the user gives an input like acl inetblock src 192.168.0.0/255.255.0.0

so is there any way i can append this line to line number 2400
will i have to use awk or sed or regex ..i dont know what to use ..

i am a noob in linux so was looking for help :slight_smile:

2

Play around with something like:

#!bin/sh

read -p "Give your input: " resp

awk -v var=$resp 'NR==2400{print var}{print}' file > new_file

Regards

3

i named the script squid.sh and this is what the output was

[userX@server1 ~]# ./squid.sh
Give your input: acl squid test dstdomain yahoo.com
awk: cmd. line:1: fatal: cannot open file `test' for reading (No such file or directory)

4

i couldnt understand what the error was here ...

5

Quote the variable:

awk -v var="$resp" 'NR==2400{print var}{print}' file > new_file

Regards