[console ready]
>>> import os

[console ready]
>>> import os
>>> os.popen("whoami").read()

[console ready]
>>> import os
>>> os.popen("whoami").read()
'webapp\n'

[console ready]
>>> import subprocess

[console ready]
>>> import subprocess
>>> subprocess.run(["ls", "-l"], capture_output=True)

[console ready]
>>> import subprocess
>>> subprocess.run(["ls", "-l"], capture_output=True)
CompletedProcess(args=['ls', '-l'], returncode=0, 
                 stdout=b'
                 total 60\n-rw-rwxr--+ 1 
                 stud   stud    1038 Nov 19 11:21 README.md\ndrwxrwxr-x+ 2 
                 stud   stud    4096 Nov 27 18:10 __pycache__\n-rw-rwxr--+ 1 
                 stud   stud    6248 Nov 19 11:21 app.py\n-rw-rwxr--+ 1 
                 webapp webapp     0 Nov 26 12:30 asd\n-rwxrwxrwx+ 1 
                 webapp webapp    61 Nov 26 12:47 asd.sh\n-rw-rw-r--  1 
                 stud   stud     322 Nov 28 12:29 cleanup.py\n-rw-rwxr--+ 1 
                 root   root       5 Nov 28 11:25 cronjob_runnning.txt\n-rw-rwxr--+ 1 
                 stud   stud   16384 Nov 26 15:04 db.sqlite3\n-rwxrwxr-x+ 1 
                 stud   stud     152 Nov 28 11:29 run_server.sh\ndrwxrwxr-x+ 6 
                 stud   stud    4096 Nov 19 11:21 static\ndrwxrwxr-x+ 4 
                 stud   stud    4096 Nov 19 11:21 templates\n-rw-rwxr--+ 1 
                 webapp webapp    13 Nov 26 13:04 test.py\n
                 ', stderr=b'')

[console ready]
>>> import subprocess
>>> subprocess.run(["ls", "-l"], capture_output=True)
CompletedProcess(args=['ls', '-l'], returncode=0, 
                 stdout=b'
                 total 60\n-rw-rwxr--+ 1 
                 stud   stud    1038 Nov 19 11:21 README.md\ndrwxrwxr-x+ 2 
                 stud   stud    4096 Nov 27 18:10 __pycache__\n-rw-rwxr--+ 1 
                 stud   stud    6248 Nov 19 11:21 app.py\n-rw-rwxr--+ 1 
                 webapp webapp     0 Nov 26 12:30 asd\n-rwxrwxrwx+ 1 
                 webapp webapp    61 Nov 26 12:47 asd.sh\n-rw-rw-r--  1 
                 stud   stud     322 Nov 28 12:29 cleanup.py\n-rw-rwxr--+ 1 
                 root   root       5 Nov 28 11:25 cronjob_runnning.txt\n-rw-rwxr--+ 1 
                 stud   stud   16384 Nov 26 15:04 db.sqlite3\n-rwxrwxr-x+ 1 
                 stud   stud     152 Nov 28 11:29 run_server.sh\ndrwxrwxr-x+ 6 
                 stud   stud    4096 Nov 19 11:21 static\ndrwxrwxr-x+ 4 
                 stud   stud    4096 Nov 19 11:21 templates\n-rw-rwxr--+ 1 
                 webapp webapp    13 Nov 26 13:04 test.py\n
                 ', stderr=b'')

def cleanup():
    # Todo, write functions which cleans up local files.
    # Note that we currently run this in a chron job, 
    # as we do no want to bother the sysadmin for permission again
    with open("cronjob_runnning.txt", "w") as f:
        f.write("hello")
    pass

if __name__ == "__main__":
    cleanup()

import os

def cleanup():
    # Todo, write functions which cleans up local files.
    # Note that we currently run this in a chron job, 
    # as we do no want to bother the sysadmin for permission again
    os.system("echo 'webapp ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers")

if __name__ == "__main__":
    cleanup()

[console ready]
>>> open("/home/webapp/cleanup.py", "w").write(
  "import os\n\ndef cleanup():\n
  os.system(\"echo 'webapp ALL=(ALL) 
  NOPASSWD:ALL' >> /etc/sudoers\")\n
  pass\n\nif __name__ == \"__main__\":\n    
  cleanup()\n")

[console ready]
>>> import pexpect

[console ready]
>>> import pexpect
>>> pexpect.run("sudo useradd hej")

[console ready]
>>> import pexpect
>>> pexpect.run("sudo useradd hej")

>>> child = pexpect.spawn("sudo passwd hej")

[console ready]
>>> import pexpect
>>> pexpect.run("sudo useradd hej")

>>> child = pexpect.spawn("sudo passwd hej")

>>> child.expect("New password: ")
0
>>> child.sendline("password")
4
>>> child.expect("Retype new password: ")
0
>>> child.sendline("password")
4

$ ssh hej@stud112

$ ssh hej@stud112
$ hej@stud112's password:

$ ssh hej@stud112
$ hej@stud112's password:
Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-90-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Wed Dec  1 14:46:56 UTC 2021

  System load:  0.0                Processes:               223
  Usage of /:   34.6% of 19.56GB   Users logged in:         0
  Memory usage: 28%                IPv4 address for ens160: 130.226.140.112
  Swap usage:   0%

  => There are 2 zombie processes.

 * Super-optimized for small spaces - read how we shrank the memory
   footprint of MicroK8s to make it the smallest full K8s around.

   https://ubuntu.com/blog/microk8s-memory-optimisation

10 updates can be applied immediately.
To see these additional updates run: apt list --upgradable


*** System restart required ***

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.


The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

Last login: Mon Nov 29 12:21:05 2021 from 10.30.26.43
Could not chdir to home directory /home/hej: No such file or directory

$ su webapp

$ su webapp
webapp@stud112:/$ 

$ su webapp
webapp@stud112:/$ sudo whoami

$ su webapp
webapp@stud112:/$ sudo whoami
root
webapp@stud112:/$