trouble feb21

root@student-virtual-machine:~# systemctl edit sshd.service
root@student-virtual-machine:~# systemctl cat sshd.service
# /lib/systemd/system/ssh.service
[Unit]
Description=OpenBSD Secure Shell server
Documentation=man:sshd(8) man:sshd_config(5)
After=network.target auditd.service
ConditionPathExists=!/etc/ssh/sshd_not_to_be_run

[Service]
EnvironmentFile=-/etc/default/ssh
ExecStartPre=/usr/sbin/sshd -t
ExecStart=/usr/sbin/sshd -D $SSHD_OPTS
ExecReload=/usr/sbin/sshd -t
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
RestartPreventExitStatus=255
Type=notify
RuntimeDirectory=sshd
RuntimeDirectoryMode=0755

[Install]
WantedBy=multi-user.target
Alias=sshd.service

# /etc/systemd/system/ssh.service.d/override.conf
[Service]
MemoryLimit=2M

root@student-virtual-machine:~# history
    1  cd /etc/default/
    2  ls
    3  vim grub
    4  apt install vim
    5  vim grub
    6  update-grub
    7  reboot
    8  vim /etc/default/grub
    9  update-grub
   10  reboot
   11  systemctl -h
   12  systemctl list-units
   13  vim /etc/fstab
   14  reboot
   15  systemctl list-units
   16  mount
   17  systemctl isolate graphical.target
   18  vim /etc/default/grub
   19  update-grub
   20  which mount
   21  mv /usr/bin/mount /usr/bin/tnuom
   22  which false
   23  cp /usr/bin/false /usr/bin/mount
   24  reboot
   25  mount
   26  exit
   27  history
   28  apt install aide
   29  aide --help | less
   30  cd /bin
   31  ls
   32  mv pr rp
   33  echo hello > pr
   34  chmod +x pr
   35  aide -C
   36  man aide
   37  cd
   38  top
   39  dd if=/dev/zero of=/dev/null &
   40  top
   41  reboot
   42  top
   43  reboot
   44  top
   45  echo f > /proc/sysrq-trigger
   46  dmesg
   47  systemctl show sshd
   48  systemctl edit sshd.service
   49  systemctl edit ssh.service
   50  apt install openssh-server
   51  systemctl edit sshd.service
   52  systemctl cat sshd.service
   53  systemctl restart sshd.service
   54  systemctl status sshd.service
   55  history