jail user with jailkit

gistfile1.txt

Download:
  https://olivier.sessink.nl/jailkit/index.html#download
  o bien: https://software.virtualmin.com/vm/6/gpl/rhel/8/x86_64/jailkit-2.23-1.el8.vm.x86_64.rpm

Then:
  Create jail dir:
    mkdir /home/jail && chown root:root /home/jail
  Initialize the jail with some commands like ssh, and group of utilities like basicshell, 
  this command copy system files to jail directory, if you want to "hardlink" instead use -k
    jk_init -v -j /home/jail basicshell editors extendedshell netutils ssh sftp scp
  Create a user as usually
    useradd -m restrollv2 
  Then jail it and assign some shell (valid shell inside the jail)
    jk_jailuser -m -j /home/jail -s /bin/bash restrollv2
  Create a /tmp onto the jail 
    mkdir /home/jail/tmp && chmod a+rwx /home/jail/tmp
  Then if something changes on your system, like something get an update, then you have to update the jail ones too
    jk_update -j /home/jail -d ; # dry-run
    jk_update -j /home/jail ; #do-it
  If something is missing, just "install it" from the local OS to the jail
    jk_init -f -v /home/jail python
  Or if something is missing but there is no default installation way
    create a new section on: /etc/jailkit/jk_init.ini
    ---cut-here--
    [missing]
    comment = anything that's having a complain
    paths = /usr/bin/id
    ---cut-here--
    then:
      jk_init -f -v -j /home/jail missing