intellimine session 1

student@student-virtual-machine:~$ history
    1  w
    2  exit
    3  ls
    4  sudo chvt 2
    5  ls
    6  ls /root
    7  sudo ls /root
    8  id
    9  history
   10  pwd
   11  sudo -i
   12  sudo chvt 3
   13  who
   14  vim countdown
   15  sudo apt install vim
   16  vim countdown
   17  countdown 11
   18  ./countdown 11
   19  ls -l countdown
   20  chmod +x countdown
   21  ./countdown 11
   22  history
   23  nano countdown
   24  echo hello
   25  echo hello > hellofile
   26  echo goodbye > Hellofile
   27  cat hellofile
   28  cat Hellofile
   29  CAT hellofile
   30  nano countdown
   31  ./countdown 0
   32  history
   33  echo $PATH
   34  ls
   35  which ls
   36  ls -l countdown
   37  ls -l hellofile
   38  countdown 11
   39  cp countdown /usr/local/bin
   40  whoami
   41  sudo cp countdown /usr/local/bin
   42  countdown 1
   43  history
   44  apt install openssh-server
   45  sudo apt install openssh-server
   46  ps
   47  ps aux
   48  ps aux | grep ssh
   49  sudo systemctl status sshd
   50  ip a
   51  history
   52  ps aux
   53  ps -aux
   54  ls --help
   55  ls --help | less
   56  cd /etc
   57  ls -lrt
   58  ls --lrt
   59  ls -lrt
   60  man ls
   61  countdown 11
   62  man man
   63  man passwd
   64  man 5 passwd
   65  man -a passwd
   66  man -k user
   67  man -k user | wc
   68  man -k user | grep 8
   69  man -k sander
   70  man man
   71  man apropos
   72  man mandb
   73  mandb
   74  sudo mandb
   75  man ls
   76  pinfo '(coreutils) ls invocation'
   77  sudo apt install pinfo
   78  pinfo '(coreutils) ls invocation'
   79  mount
   80  lsblk
   81  sudo gdisk /dev/sda
   82  cd /dev
   83  ls -l
   84  ls
   85  w
   86  cd /etc
   87  ls
   88  cat passwd
   89  cat shadow
   90  ls -l shadow
   91  ls -l passwd
   92  id
   93  sudo cat shadow
   94  ls
   95  less rsyslog.conf
   96  cd /
   97  ls
   98  man hier
   99  cd boot
  100  ls
  101  ls -l
  102  cd /home
  103  ls
  104  cd /root
  105  cd /usr
  106  ls
  107  cd /proc
  108  ls
  109  sudo cat meminfo
  110  ls
  111  ps aux | grep sshd
  112  cd 5504
  113  ls
  114  cat environ
  115  sudo cat environ
  116  sudo cat status
  117  cd /proc/sys
  118  ls
  119  sudo sysctl -a
  120  sudo sysctl -a | wc
  121  cd
  122  history
  123  sudo poweroff
  124  history
student@student-virtual-machine:~$
student@student-virtual-machine:~$ cat countdown
#!/bin/bash

COUNTER=$1
COUNTER=$(( COUNTER * 60 ))

while true
do
	echo $COUNTER seconds remaining in break
	COUNTER=$(( COUNTER - 1 ))
	sleep 1
done