sanderLinuxIn3hrsOct022020

[student@localhost ~]$ cat countdown
#!/bin/bash

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

while true
do
    echo $COUNTER seconds remaining in break
    sleep 1
    COUNTER=$(( COUNTER - 1 ))
done
[student@localhost ~]$ history
    1  sudo systemctl isolate multi-user.target
    2  sudo systemctl status sshd
    3  sudo firewall-cmd --list-all
    4  ip a
    5  vim countdown
    6  countdown
    7  ./countdown
    8  chmod +x countdown
    9  ./countdown 12
   10  history
   11  ls -l countdown
   12  echo $PATH
   13  countdown
   14  pwd
   15  cp countdown /usr/local/bin
   16  sudo cp countdown /usr/local/bin
   17  countdown 0
   18  history
   19  man hier
   20  man cp
   21  man hier
   22  man usr
   23  useradd linda
   24  sudo useradd linda
   25  sudo passwd linda
   26  su - linda
   27  id
   28  sudo -i
   29  cat countdown
   30  history


ROOT COMMANDS[root@localhost ~]# history
    1  whoami
    2  systemctl isolate graphical.target
    3  whoami
    4  cd /
    5  ls
    6  ls -l
    7  cd /usr
    8  ls
    9  cd /
   10  ls
   11  cd etc
   12  ls
   13  cat passwd
   14  cat shadow
   15  grep linda *
   16  grep linda * 2>/dev/null
   17  grep -R linda * 2>/dev/null
   18  cd /
   19  ls
   20  cd boot
   21  ls -l
   22  lsmod
   23  lsmod | less
   24  lsblk
   25  cd /
   26  umount /dev/sdb1
   27  umount /boot
   28  ls /boot
   29  cd boot
   30  ls
   31  lsblk
   32  cd
   33  mount /dev/sda1 /boot
   34  ls /boot/
   35  lsblk
   36  cd /dev
   37  ls -l
   38  ls
   39  cd
   40  cd /
   41  ls
   42  cd /tmp
   43  ls
   44  cd /var
   45  ls
   46  cd log
   47  ls
   48  cd /
   49  cd proc
   50  ls
   51  cat cpuinfo
   52  cd
   53  ls -l /etc/hosts
   54  ls -l -a
   55  ls -la
   56  netstat -tulpen
   57  ps -axf
   58  ps -fax
   59  echo hello > hellofile
   60  cat hellofile
   61  history
   62  ls -a
   63  env
   64  env | grep HIST
   65  history
   66  history -d 61
   67  echo $PATH
   68  ln /usr/local/bin/countdown /usr/local/sbin/countdown
   69  countdown 12
   70  man password
   71  man -k user
   72  mandb
   73  man -k user
   74  man -k user | wc
   75  man man
   76  man -k user | grep 8
   77  man useradd
   78  man semanage-fcontext
   79  useradd --help
   80  rpm -qa | grep bash
   81  nmcli connection add con-name democon ipv4.method manual ipv4.addresses 192.168.4.150/24 ipv4.gateway ipv4.dns 8.8.8.8
   82  nmcli connection add con-name democon ipv4.method manual ipv4.addresses 192.168.4.150/24 ipv4.gateway 192.168.4.2 ipv4.dns 8.8.8.8
   83  nmcli connection add con-name democon ipv4.method manual ipv4.addresses 192.168.4.150/24 ipv4.gateway 192.168.4.2 ipv4.dns 8.8.8.8 type ethernet
   84  sleep 3600
   85  jobs
   86  bg
   87  jobs
   88  ps aux
   89  kill 41825
   90  jobs
   91  dd if=/dev/zero of=/dev/null &
   92  top
   93  ps aux | less
   94  id student
   95  id linda
   96  usermod -aG wheel linda
   97  id linsda
   98  id linda
   99  usermod -aG docker linda
  100  ls -l /etc/passwd /etc/shadow
  101  cat /etc/shadow
  102  ls -l /etc/passwd /etc/shadow
  103  echo hello > /tmp/testfile
  104  chown linda /tmp/testfile
  105  chmod 077 /tmp/testfile
  106  ls -l /tmp/testfile
  107  su - linda
  108  touch removeme
  109  chattr +i removeme
  110  ls -l
  111  rm -f removeme
  112  lsattr
  113  chattr -i removeme
  114  rm -f removeme
  115  history
  116  nmcli con show
  117  nmcli connection up democon
  118  nmcli con show
  119  ip a
  120  ip addr add dev ens33 10.0.0.10/24
  121  ping 10.0.0.10
  122  ip a
  123  ifconfig
  124  ifconfig -a
  125  man ifconfig
  126  which ifconfig
  127  rpm -qf $(which ifconfig)
  128  rpm -ql net-tools
  129  yum delete net-tools
  130  yum remove net-tools
  131  ip route show
  132  cat /etc/resolv.conf
  133  cd /
  134  ls -l
  135  yum install nmap
  136  apt-get install nmap
  137  exit
  138  history