#!/usr/bin/perl
use strict;
use warnings;
use feature 'say';
use IPC::Run qw( run timeout );

sub rename_account {
    my ($in, $out, $err);
    my ( $name , $nname ) = ( @_ );
    my @usename = ("usermod", "-l", "$nname", "$name");
    run \@usename, \$in, \$out, \$err, timeout( 10 ) or die "Error: $?";
    say "OUT: $out" if $out;
    say "Error: $err" if $err;

    my @changeHomeDir = ("usermod", "-d", "/home/$nname", "-m", "$nname");
    run \@changeHomeDir, \$in, \$out, \$err, timeout( 10 ) or die "Error: $?";
    say "OUT: $out" if $out;
    say "Error: $err" if $err;

    my @homeDir = ("ls", "-la", "/home");
    run \@homeDir, \$in, \$out, \$err, timeout( 10 ) or die "Error: $?";
    chomp $out;
    return $out if $out;
    return "Error: $err" if $err;
}

say rename_account("monk", "testUser");
# say rename_account("testUser", "monk");

__END__

$ sudo perl test.pl
total 12
drwxr-xr-x  4 root     root     4096 Mar 21 19:52 .
drwxr-xr-x 24 root     root     4096 Mar  5 20:59 ..
drwxr-xr-x  2 testUser testUser 4096 Mar 21 19:16 testUser