I am writing a script to RSH into servers from a text file and create a specific user on each system. I work for a university that is currently testing Amazon EC2 for their courses. Is it possible to take colon or comma separated values in a text file like this :
server.edu:user123:John:[email protected]
and pass them to a BASH script as $server $username etc...
Yes you can use it like this:
> s='server.edu:user123:John:[email protected]'
> IFS=: read server username email <<< "$s"
> echo "$server"
server.edu
> echo "$username"
user123
> echo "$email"
John:[email protected]
EDIT:: For reading this data from file line by line
while IFS=: read server username email; do
echo "$server"
echo "$username"
echo "$email"
done < file
It is possible to read lines of colon-separated data from file into an array directly and index into it:
while IFS=: read -a userdata; do
printf "server: %s\n" "${userdata[0]}"
printf "username: %s\n" "${userdata[1]}"
printf "name: %s\n" "${userdata[2]}"
printf "email: %s\n" "${userdata[3]}"
done < data_file