quick script to login and rename the hosts with ssh, username, and password

rename_hosts.py

import paramiko, re, time

script_target = '/srv/nfs/cortana/logs/cmd/modify_host.py'
script_data= '''data = open('/etc/hosts').read()
name = open('/etc/hostname').read().strip()
new_data = data.replace('python-workx64-replaceme', name)
open('/etc/hosts', 'w').write(new_data)'''

open(script_target, 'w').write(script_data)

def ssh_to_target (hostname, username, password):
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(hostname, username=username, password=password)
    return client

def exec_cmds (client, password, cmds):
    for cmd in cmds:
        transport = client.get_transport()
        session = transport.open_session()
        session.set_combine_stderr(True)
        session.get_pty()
        print "Executing cmd: %s"%cmd
        session.exec_command(cmd)
        stdin = session.makefile('wb', -1)
        stdout = session.makefile('rb', -1)
        #you have to check if you really need to send password here 
        #stdin.write(password +'\n')
        #stdin.flush()
        for line in stdout.read().splitlines():        
            print 'host: %s: %s' % (host, line)

user = "java"
password = "java"


for i in xrange(0, 20):
    host = "10.16.120.1{:02d}".format(i)
    cmd = '''sudo sh -c "echo 'python-workx64-{:02d}' > /etc/hostname"'''.format(i)
    cmd2 = 'sudo python {}'.format(script_target)
    client = ssh_to_target(host, username=user, password=password)
    exec_cmds(client, password, [cmd, cmd2])