rhcsa sept19-23 day2

  1  free -m
    2  lscpu
    3  df -h
    4  lsblk
    5  vim countdown
    6  chmod +x countdown
    7  ./countdown 14
    8  ./countdown 14 lab
    9  tar -czvf /root/archive.tgz /etc
   10  ls -l
   11  file archive.tgz
   12  tar -tvf archive.tgz
   13  tar -czvf /root/archive.tgz /etc/
   14  tar -tvf archive.tgz
   15  tar -czvf /root/archive.tgz /etc/*
   16  tar -tvf archive.tgz
   17  rm archive.tgz
   18  tar -czvf /root/archive.tgz /etc/*
   19  tar -tvf archive.tgz
   20  cd /etc
   21  tar -czvf /root/archive.tgz .
   22  tar -tvf /root/archive.tgz
   23  cd
   24  rm archive.tgz
   25  tar -czvf /root/archive.tgz -C /etc
   26  tar -czvf /root/archive.tgz -C /etc .
   27  history
   28  grep -v '^$' /etc/dnsmasq.conf
   29  grep -v '^$' /etc/dnsmasq.conf | sort
   30  history
   31  useradd bob
   32  find / -type f -user bob
   33  mkdir /root/userfiles ; find / -type f -user bob -exec cp {} /root/userfiles/ \;
   34  history
   35  mkdir /root/userfiles ; find / -type f -user bob -exec cp {} /root/userfiles/ \; 2> errors.txt
   36  cat errors.txt
   37  uname -r
   38  visudo
   39  useradd linda
   40  echo password | passwd --stdin linda
   41  visudo
   42  which useradd
   43  which userdel
   44  which passwd
   45  su - linda
   46  visudo
   47  su - linda
   48  visudo
   49  id student
   50  exit
   51  visudo
   52  history
   53  man -k sander
   54  touch hello
   55  locate hello
   56  updatedb
   57  locate hello
   58  touch goedemiddag
   59  locate goedemiddag
   60  less /etc/passwd
   61  vim /etc/login.defs
   62  useradd --help | less
   63  cd /etc/skel/
   64  touch lijk
   65  useradd anna
   66  ls -al /home/anna
   67  tail /etc/passwd
   68  ls -l /etc/passwd
   69  tail /etc/shadow
   70  man 5 shadow
   71  cd
   72  grep anna /etc/passwd
   73  grep 1004 /etc/group
   74  groupadd profs
   75  usermod -aG profs anna
   76  grep anna /etc/passwd
   77  grep anna /etc/group
   78  id anna
   79  lid -g wheel
   80  history
   81  vim /etc/login.defs
   82  cd /etc/skel
   83  touch newfile
   84  groupadd profs
   85  groupadd students
   86  useradd -G profs anna
   87  usermod -aG profs anna
   88  usermod -aG profs linda
   89  usermod -aG students lisa
   90  usermod -aG students linda
   91  useradd -G profs anouk
   92  vim /etc/group
   93  for i in anna anouk linda lisa; do echo password | passwd --stdin $i; done
   94  history
   95  su - linda
   96  ls -l /tmp/linda1
   97  id linda
   98  su - linda
   99  chmod 077 /tmp/linda1
  100  su - linda
  101  mkdir -p /data/specials
  102  chgrp sales /data/specials
  103  chgrp student /data/specials
  104  ls -ld /data/specials/
  105  chmod g+w /data/specials
  106  chmod g-w /data/specials
  107  mkdir /data/specials/dir{1-9}
  108  touch /data/specials/file{1-9}
  109  ls -l /data/specials/
  110  touch /data/specials/file[1-9]
  111  ls -l /data/specials/
  112  cd /data/specials/*
  113  rm -fr /data/specials/*
  114  touch /data/specials/file{1..9}
  115  mkdir /data/specials/dir{1..}
  116  ls -l /data/specials/
  117  mkdir /data/specials/dir{1..9}
  118  ls -l /data/specials/
  119  chgrp students /data/specials/ -R
  120  ls -l /data/specials/
  121  chmod -R +w /data/specials/
  122  chmod -R -x /data/specials/
  123  ls -l /data/specials/
  124  chmod -R +x /data/specials/
  125  ls -l /data/specials/
  126  chmod -R -x /data/specials/
  127  chmod -R +X /data/specials/
  128  ls -l /data/specials/
  129  mkdir -p /data/profs /data/students
  130  ls -l /data/
  131  chown :profs /data/profs
  132  chgrp student /data/students
  133  ls -l /data/
  134  chmod 770 /data/*
  135  ls -k
  136  ls -l
  137  ls -l /data
  138  chmod g+w,o-rx /data/profs
  139  cd
  140  touch /home/linda/rootfile
  141  su - linda
  142  touch /home/linda/stuck
  143  chattr +i /home/linda/stuck
  144  rm -f /home/linda/stuck
  145  chattr -i /home/linda/stuck
  146  su - anna
  147  chmod g+s /data/profs
  148  ls -ld /data/profs
  149  su - anna
  150  su - anouk
  151  chmod +t /data/profs
  152  su - anouk
  153  chmod o+x /data/profs
  154  ls -ld /data/profs
  155  history
  156  umask
  157  su - linda
  158  su - lisa
  159  cd /data
  160  ls -,
  161  ls -l
  162  chmod 3770 *
  163  ls -l
  164  chattr +i students/
  165  cd students/
  166  ls
  167  touch student1
  168  echo hello > hello
  169  exit
  170  ./countdown 12
  171  ./countdown 1
  172  ./countdown 15
  173  ./countdown 13
  174  chattr -i /data/students/
  175  poweroff
  176  lsblk
  177  fdisk /dev/sda
  178  lsblk
  179  mount /dev/sda3 /mnt
  180  mkfs.ext4 /dev/sda3
  181  mount /dev/sda3 /mnt
  182  cd /mnt
  183  ls
  184  cp /etc/hosts .
  185  history
  186  cd
  187  lsblk
  188  mount
  189  findmnt
  190  lsblk
  191  cd .mnt
  192  cd /mnt
  193  umount /dev/sda3
  194  lsof /mnt
  195  cd
  196  fdisk /dev/sda
  197  cat /proc/partitions
  198  lsblk
  199  mkfs.ext4 /dev/sda5
  200  mkfs.xfs /dev/sda6
  201  mkdir /ext4 /xfs
  202  vim /etc/fstab
  203  mount -a
  204  mount
  205  lsblk
  206  reboot
  207  lsblk
  208  vim /etc/default/grub
  209  grub2-mkconfig -o /boot/grub2/grub.cfg
  210  vim /etc/default/grub
  211  cat /etc/redhat-release
  212  findmnt --help
  213  cat /etc/redhat-release
  214  man fstab
  215  history
  216  umount /dev/sda5
  217  vim /etc/fstab
  218  fdisk /dev/sda
  219  reboot
  220  lsblk
  221  cat /etc/fstab
  222  blkid
  223  blkid | awk '/sda5/ { print $2 }'
  224  blkid | awk '/sda5/ { print $2 }' >> /etc/fstab
  225  vim /etc/fstab
  226  reboot
  227  history
  228  tune2fs --help
  229  mount | grep ext
  230  xfs_admin --help
  231  xfs_admin -L data /dev/sda5
  232  umount /dev/sda5
  233  xfs_admin -L data /dev/sda5
  234  vim /etc/fstab
  235  grep LABEL /etc/fstab
  236  mount -a
  237  blkid
  238  free -m
  239  reboot
  240  free -m
  241  grep -i active /proc/meminfo
  242  free -m
  243  fdisk /dev/sda
  244  mkswap /dev/sda6
  245  blkid
  246  blkid | awk '/sda6/ { print $2 }'
  247  blkid | awk '/sda6/ { print $2 }' >> /etc/fstab
  248  vim /etc/fstab
  249  free -m
  250  swapon -a
  251  free -m
  252  reboot
  253  fdisk -l /dev/sda
  254  xxd -l 512 /dev/sda
  255  history
  256  dnf install nmap
  257  ls -l $(which dnf) $(which yum)
  258  df -h
  259  dd if=/dev/sr0 of=/rhel9.iso bs=1M
  260  mkdir /repo
  261  echo "/rhel9.iso /repo iso9660 defaults 0 0" >> /etc/fstab
  262  cat /etc/fstab
  263  vim /etc/fstab
  264  mount -a
  265  mount
  266  cd /repo
  267  ls
  268  ls BaseOS/
  269  dnf config-manager --add-repo="file:///repo/BaseOS"
  270  dnf config-manager --add-repo="file:///repo/AppStream"
  271  dnf repolist
  272  dnf search nmap
  273  dnf install nmap
  274  cd /etc/yum.repos.d/
  275  ls
  276  vim repo_BaseOS.repo
  277  vim repo_AppStream.repo
  278  dnf install nmap
  279  history
  280  dnf list selinux*
  281  dnf provides */Containerfile
  282  cd ..
  283  dnf provides */dnsmasq.conf
  284  seinfo
  285  dnf groups list
  286  dnf goups install "Virtualization Host"
  287  dnf groups install "Virtualization Host"
  288  cat yum.repos.d/repo_BaseOS.repo
  289  systemctl enable --now tuned
  290  systemctl status tuned
  291  tuned-adm list
  292  sysctl -a
  293  sysctl -a | wc -l
  294  sysctl -a | grep swappi
  295  echo vm.swappiness = 33 > /etc/sysctl.d/swappiness.conf
  296  sysctl -p /etc/sysctl.d/swappiness.conf
  297  sysctl -a | grep swappi
  298  mkdir /etc/tune/myprofile
  299  mkdir /etc/tuned/myprofile
  300  vim /etc/tuned/myprofile/tuned.conf
  301  tuned-adm list
  302  vim /usr/lib/tuned/latency-performance/tuned.conf
  303  tuned-adm profile myprofile
  304  sysctl -a | grep swapp
  305  vim /etc/tuned/tuned-main.conf
  306  tuned-adm list
  307  systemctl status tuned
  308  tuned-adm profile hpc-compute
  309  tuned-adm list
  310  history
  311  cd
  312  ip a
  313  ping nu.nl
  314  ip route show
  315  cat /etc/resolv.conf
  316  systemctl status NetworkManager
  317  nmtui
  318  ip a
  319  ping nu.nl
  320  man nmcli-examples
  321  dnf install -y git
  322  git clone https://github.com/sandervanvugt/rhcsa
  323  cd rhcsa
  324  ls
  325  cat resources.txt
  326  reboot
  327  hwclock
  328  date
  329  hwclock --systohc
  330  date -s 17:46
  331  timedatectl set-time -h
  332  systemctl status chronyd.service
  333  vim /etc/chrony.conf
  334  systemctl restart chronyd
  335  chronyc sources
  336  systemctl status firewalld
  337  firewall-cmd --list-all
  338  firewall-cmd --get-services
  339  firewall-cmd --add-service sane
  340  firewall-cmd --list-all
  341  firewall-cmd --add-service sane --permanent
  342  history