connect to a remote host in perl and run ssh commands as a root user

Question

I am trying to connect to a remote host as a user. Now i want to run a few commands that need sudo access. The commands are:

export http_proxy=http://xxxx.xx.xx.com:8080
export https_proxy=http://xxxx-xxxx.xx.xx.com:8080
sudo /etc/init.d/filebeat restart
sudo tail -f /var/log/filebeat/filebeat

I tried executing this using

my $ssh = Net::OpenSSH->new("$username\@$Hostname", password => $pass);
my @cmdF = "/etc/init.d/filebeat restart";
print "Restarting filebeat for $webHosts[$i]";
my @cmdF = "/etc/init.d/filebeat restart";
my $outputF = $ssh->capture({stdin_data=>"$pass\n"}, 'sudo', '-Sk', '-p', '', '-', @cmdF);
print "\nCurrent Filebeat Status : $outputF\n\n";

I took just one command at the moment but ended up getting this error:

sudo: /etc/init.d/filebeat restart: command not found

Please help me with the same for all commands..

Thank you in advance.

Try my @cmdF = ("/etc/init.d/filebeat" "restart") instead, i.e. separat command and command arguments in different list entries. Otherwise sudo will look a file named /etc/init.d/filebeat restart to execute - which does not exist — Steffen Ullrich
– Steffen Ullrich, Commented Mar 27, 2023 at 10:24

ikegami · Accepted Answer · 2023-03-27 19:16:19Z

1

sudo /etc/init.d/filebeat restart consists of three arguments (including the command):

sudo
/etc/init.d/filebeat
restart

You execute these instead:

sudo
-Sk
-p
Empty string
-
/etc/init.d/filebeat restart

Most relevant is that you combined two arguments into one, producing garbage.

What you need:

my $commands = <<'.';
export http_proxy=http://xxxx.xx.xx.com:8080
export https_proxy=http://xxxx-xxxx.xx.xx.com:8080
sudo /etc/init.d/filebeat restart
sudo tail -f /var/log/filebeat/filebeat
.

$ssh->capture( 'sh', '-c', $commands );

edited Mar 27, 2023 at 19:16

answered Mar 27, 2023 at 16:15

ikegami

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4 Comments

Daksha Over a year ago

How should I pass the password in this case then?

ikegami Over a year ago

Are you saying you want to execute different commands than the ones you said you wanted to execute? Feel free to fix your question if that's the case.

Daksha Over a year ago

I wish to run these commands as a root user on a remote host for which I was passing an argument called $pass.

ikegami Over a year ago

I copied the commands you posted exactly.commands you posted exactly. There's no password argument. If you want to run sh itself as root, feel free to use the approach you were using.

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