UNIX for Dummies Questions & Answers

[wadhwaso@nxnixd01 ~]$ echo "hello" >> test 
[wadhwaso@nxnixd01 ~]$ cat test 
hello 
[wadhwaso@nxnixd01 ~]$ echo -n "world" >> test 
[wadhwaso@nxnixd01 ~]$ cat test 
hello 
world 
[wadhwaso@nxnixd01 ~]$ echo -n " seriously?" >> test 
[wadhwaso@nxnixd01 ~]$ cat test 
hello 
world seriously?

echo -e "hello\c" > file

sed '$s/$/,string/' infile

 awk -F, '{print$0 ",string"}' test.txt

#!/bin/bash

GRUB="/home/wadhwaso/test"
_pair="$(</home/wadhwaso/login.txt)"
Server_info="/home/wadhwaso/server_info"
for e in $_pair
do
             # extract user and ips for each $e in $_pair
        IFS='@'
        set -- $e
        _user="$1"
        _ip="$2"

        sleep 2
        echo "Connecting to server '${_ip}' via SSH..."
        ssh ${_user}@${_ip} "sudo /bin/sed -i '$s/$/ elevator=noop/' /home/wadhwaso/test "
        if [ $? -eq 0 ]; then
        echo "completed on ${_ip}" | tee -a "${Server_info}"
        else
        echo "not completed on ${_ip}" | tee -a "${Server_info}"
        fi
done

ssh user@server  "sed -i '$s/$/ elevator=noop/' /home/wadhwaso/test"