Tips and tricks: Difference between revisions
From DWIKI
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Note the "-t" which is required, otherwise you get "sudo: no tty present and no askpass program specified" | Note the "-t" which is required, otherwise you get "sudo: no tty present and no askpass program specified" | ||
=Generate random mac address= | |||
#!/usr/bin/python | |||
# macgen.py script to generate a MAC address for guest virtual machines | |||
# | |||
import random | |||
# | |||
def randomMAC(): | |||
mac = [ 0x00, 0x16, 0x3e, | |||
random.randint(0x00, 0x7f), | |||
random.randint(0x00, 0xff), | |||
random.randint(0x00, 0xff) ] | |||
return ':'.join(map(lambda x: "%02x" % x, mac)) | |||
# | |||
print randomMAC() | |||
Revision as of 11:19, 26 August 2016
Clone disk over ssh
On remotehost:
- have a user 'someuser' you can ssh to with key, so without password. This user must NOT be in wheel/sudoers/admin group!!!
add a line "someuser ALL=(ALL) NOPASSWD: /bin/dd
Then you can run
ssh -C -t someuser@remotehost "dd if=/dev/sdXX" | dd of=/dev/sdXY
Note the "-t" which is required, otherwise you get "sudo: no tty present and no askpass program specified"
Generate random mac address
#!/usr/bin/python
# macgen.py script to generate a MAC address for guest virtual machines
#
import random
#
def randomMAC():
mac = [ 0x00, 0x16, 0x3e,
random.randint(0x00, 0x7f),
random.randint(0x00, 0xff),
random.randint(0x00, 0xff) ]
return ':'.join(map(lambda x: "%02x" % x, mac))
#
print randomMAC()
