Read File (Column and looping) and ssh

Question

I have 1 input file contains username and hostname example:

ID1  host1
ID2  host2
ID3  host3
ID4  host1

Totally no script created yet.

My Question How I can make the script read username and do ssh based on host to do ssh.

ssh -q $host 'grep $user /etc/passwd'

and it looping until finish.

Thank you in advanced very Appreciate

script read the input file and read column 1 and column 2 as a input and then loop until the all line in the input are read.

do have

output , will show the result based on the input ID and do ssh to get the output.

score 0 · Answer 1 · answered Apr 02 '19 at 10:34

0

while read -r user host;
do
  echo "${user}" # The ID?
  `your code`
done < inputfile

answered Apr 02 '19 at 10:34

itChi

Guiseppe Kalzone · Answer 2 · 2019-04-19T18:24:14.093

0

you don't need an entire script for this, simply try this:

$ cat filename.txt  | awk '{system("ssh "$2" grep "$1" /etc/passwd;")}'

or

$ cat filename.txt | awk '{system("ssh "$2" getent passwd "$1";")}'

edited Apr 19 '19 at 18:24

answered Apr 02 '19 at 11:26

Guiseppe Kalzone

itChi & Guiseppe Kalzone TQ for the update .. let me try , actually after grep I need to delete the account from /etc/passwd. let me try on both code. again many thanks – Bangau Putih Apr 03 '19 at 02:17
not work for me - empty output. if remoce xargs it show the syntax but it not run. – Bangau Putih Apr 08 '19 at 06:15
Damn, sorry didn't check the command, let's remove the xargs part and run it with awk. I'll update the command – Guiseppe Kalzone Apr 19 '19 at 18:21

2 Answers2