RHCSA day2 july23

[root@rhcsa ~]# history
    1  ls
    2  exit
    3  tar cvzf archive.tgz /etc
    4  tar tvf archive.tgz
    5  history
    6  grep -v '^$' /etc/dnsmasq.conf
    7  grep -v '^$' /etc/dnsmasq.conf | sort
    8  grep -v '^$' /etc/dnsmasq.conf | sort > /var/tmp/dnslines.txt
    9  useradd bob
   10  find / -user bob
   11  find / -user bob -type f
   12  mkdir /root/userfiles; find / -user bob -type f -exec cp {} /root/userfiles/ \;
   13  ls -al /root/userfiles/
   14  history
   15  ls -ld /etc/sudo*
   16  visudo
   17  vim /etc/sudoers.d/bob
   18  tail -1 /etc/passwd
   19  su - bob
   20  passwd bob
   21  su - bob
   22  cat /etc/sudoers.d/bob
   23  id student
   24  history
   25  visudo
   26  exit
   27  history
   28  su - lisa
   29  grep lisa /etc/sudoers
   30  cat /etc/passwd
   31  head /etc/passwd
   32  useradd --help | less
   33  useradd bill -p password
   34  tail -1 /etc/shadow
   35  tail -5 /etc/shadow
   36  echo password | passwd --stdin bill
   37  tail -5 /etc/shadow
   38  vim /etc/login.defs
   39  useradd -p password peter
   40  su - student
   41  cd /etc/skel/
   42  ls -a
   43  touch hellefile
   44  useradd bea
   45  ls -l /home/bea
   46  ls -al /home/bea
   47  id lisa
   48  id student
   49  groupadd sales
   50  usermod -aG sales lisa
   51  usermod --help
   52  usermod -G wheel lisa
   53  id lisa
   54  usermod -aG sales lisa
   55  id lisa
   56  exit
   57  chage --help
   58  chage -l lisa
   59  chage -M 99 lisa
   60  chage -l lisa
   61  chage lisa
   62  /home/student/countdown 15
   63  vim /etc/login.defs
   64  cd /etc/skel/
   65  touch newfile
   66  vim /etc/default/useradd
   67  for i in anna anouk lisa linda; do useradd $i; done
   68  for i in anna anouk lisa linda; do echo password | passwd --stdin $i; done
   69  groupadd profs
   70  groupadd students
   71  usermod -aG profs anouk
   72  usermod -aG profs anna
   73  usermod -aG students linda
   74  usermod -aG students lisa
   75  ls -l /etc/hosts
   76  cd /tmp
   77  echo hello > hellofile
   78  chown linda hellofile
   79  chmod 077 hellofile
   80  ls -l hellofile
   81  su - linda
   82  cd
   83  cd /home/linda
   84  touch lindafile
   85  ls -l lindafile
   86  echo linda > lindafile
   87  su - linda
   88  ls -l
   89  chmod 640 lindafile
   90  su - linda
   91  cd
   92  cd /tmp
   93  mkdir testdir
   94  touch testdir/file{1..10}
   95  ls -l testdir/
   96  chmod --helo
   97  chmod --hel
   98  chmod -R +x testdir/
   99  ls -l testdir/
  100  chmod -R -x testdir/
  101  mkdir testdir/subdir
  102  chmod -R +X testdir/
  103  ls -ld testdir/
  104  ls -l testdir/
  105  cd
  106  mkdir -p /data/profs /data/students
  107  ls -l /data
  108  chown :profs /data/profs
  109  ls -l /data
  110  chgrp students /data/students
  111  ls -l /data
  112  chmod 770 /data/students
  113  ls -l /data
  114  chmod g+w,o-rx /data/profs
  115  ls -l /data
  116  su - anna
  117  chmod g+s /data/profs
  118  ls -l /data
  119  su - anna
  120  su - anouk
  121  chmod +t /data/profs
  122  ls -l /data
  123  su - anouk
  124  umask
  125  /home/student/countdown 15
  126  mkdir -p /data/students /data/profs
  127  ls /data
  128  cd /data
  129  chmod 770 *
  130  ls -l
  131  umask
  132  cd profs
  133  umask 002
  134  touch rootfile
  135  ls -l rootfile
  136  lsblk
  137  poweroff
  138  vim /etc/fstab
  139  fdisk -l
  140  touch ff
  141  mount -o remount,rw /
  142  touch ff
  143  vim /etc/fstab
  144  blkid
  145  blkid | grep sda5 | awk '{ print $2 '}
  146  blkid | awk '/sda5/ { print $2 '}
  147  blkid | awk '/sda5/ { print $2 '} >> /etc/fstab
  148  vim /etc/fstab
  149  reboot
  150  blkid
  151  history
  152  xxd -l 512 /dev/sda
  153  cat /etc/fstab
  154  blkid
  155  df -h
  156  xfs_admin -L kona /dev/sda5
  157  umount /dev/sda5
  158  xfs_admin -L kona /dev/sda5
  159  vim /etc/fstab
  160  ln /home/student/countdown /usr/local/bin/countdown
  161  ln /home/student/countdown /usr/local/sbin/countdown
  162  history
  163  free -m
  164  fdisk /dev/sda
  165  lsblk
  166  mkswap /dev/sda6
  167  vim /etc/fstab
  168  swapon -a
  169  free -m
  170  dd if=/dev/zero of=/swapfile bs=1M count=1024
  171  mkswap /swapfile
  172  chmod 600 /swapfile
  173  swapon /swapfile
  174  free -m
  175  history
  176  df -h
  177  dd if=/dev/sr0 of=/rhel9.iso bs=1M
  178  mkdir /repo
  179  vim /etc/fstab
  180  mount -a
  181  mount
  182  ls /repo
  183  ls /repo/BaseOS
  184  history
  185  tail -1 /etc/fstab
  186  df -h
  187  countdown 1
  188  dd if=/dev/sr0 of=/dummy
  189  history
  190  ls /repo
  191  dnf config-manager --add-repo="file:///repo/BaseOS"
  192  dnf config-manager --add-repo="file:///repo/AppStream"
  193  cd /etc/yum.repos.d/
  194  ls
  195  vim repo_BaseOS.repo
  196  cd
  197  dnf repolist
  198  dnf search nmap
  199  dnf install nmap
  200  vim /etc/yum.repos.d/repo_BaseOS.repo
  201  vim /etc/yum.repos.d/repo_AppStream.repo
  202  dnf install nmap
  203  history
  204  cat /etc/yum.repos.d/repo_BaseOS.repo
  205  ls /repo
  206  cd /etc/yum.repos.d/
  207  vim repo_BaseOS.repo
  208  dnf list 'selinux*'
  209  dnf provides */seinfo
  210  seinfo
  211  dnf provides */Containerfile
  212  dnf group list
  213  dnf module list
  214  dnf module info nginx
  215  cd
  216  top
  217  dd if=/dev/zero of=/dev/null &
  218  top
  219  echo 0 > /sys/bus/cpu/devices/cpu1/online
  220  top
  221  echo 1 > /sys/bus/cpu/devices/cpu1/online
  222  top
  223  killall dd
  224  cat /proc/sys/vm/swappiness
  225  echo 40 > /proc/sys/vm/swappiness
  226  cat /proc/sys/vm/swappiness
  227  sysctl -a | grep swapp
  228  vim /etc/sysctl.d/swappi.conf
  229  tuned-adm list
  230  ls /usr/lib/tuned/
  231  ls /usr/lib/tuned/virtual-guest/tuned.conf
  232  cat /usr/lib/tuned/virtual-guest/tuned.conf
  233  tuned-adm profile powersav e
  234  tuned-adm profile powersave
  235  tuned-adm list
  236  countdown 13
  237  systemctl status NetworkManager
  238  ip addr show
  239  nmtui
  240  ip a
  241  nmtui
  242  exit
  243  hostnamectl status
  244  reboot
  245  exit
  246  timedatectl status
  247  timedatectl set-time 17:48
  248  date -s 17:48
  249  systemctl status chronyd
  250  vim /etc/chrony.conf
  251  systemctl restart chronyd
  252  chronyc sources
  253  history