rhcsa2 day2 july22

root@localhost ~]# xxd /dev/sda8 | less
[root@localhost ~]# history
    1  vim countdown
    2  chmod +x countdown
    3  ./countdown 14
    4  vim countdown
    5  ./countdown 14
    6  tar -czf /root/archive.tgz /etc
    7  ls -l archive.tgz
    8  file archive.tgz
    9  tar tvf archive.tgz
   10  history
   11  grep -v '^$' /etc/dnsmasq.conf | sort > /var/tmp/dnslines.txt
   12  echo $USER
   13  useradd bob
   14  find / -user bob
   15  mkdir /root/userfiles ; find / -user bob -exec cp {} /root/userfiles/ \;
   16  find / -user bob
   17  find / -user bob -t file
   18  find / -user bob
   19  find / -user bob -type f
   20  visudo
   21  useradd lisa
   22  passwd lisa
   23  visudo
   24  su - lisa
   25  visudo
   26  su - lisa
   27  ls -ld /etc/sudoers.d/
   28  ls -l /etc/sudoers.d/
   29  vim /etc/sudoers.d/bob
   30  visudo
   31  man visudo
   32  visudo
   33  ./countdown 12
   34  tail /etc/shadow
   35  usermod -L bob
   36  tail /etc/shadow
   37  passwd --help
   38  passwd -u bob
   39  tail /etc/shadow
   40  vim /etc/passwd
   41  vim /etc/login.defs
   42  echo $(( 99999 / 365 ))
   43  vim /etc/login.defs
   44  useradd --help | less
   45  groupadd sales
   46  usermod -aG sales student
   47  exit
   48  lid -g wheel
   49  lid sales
   50  lid -g sales
   51  chage bob
   52  vim /etc/login.defs
   53  cd /etc/skel/
   54  ls -a
   55  echo hidem > .hiddenfile
   56  echo hello > hellofile
   57  ls -a
   58  for i in anna anouk linda lisa; do useradd $i; done
   59  tail /etc/shadow
   60  usermod --help
   61  usermod -s /sbin/nologin linda
   62  usermod -s /sbin/nologin lisa
   63  groupadd students
   64  groupadd profs
   65  usermod -aG profs anna
   66  usermod -aG profs anouk
   67  id anna
   68  usermod -aG wheel anna
   69  id anna
   70  usermod -G wheel anna
   71  id anna
   72  history
   73  usermod -s /bin/bash linda
   74  usermod -s /bin/bash lisa
   75  usermod -aG students linda
   76  usermod -aG students lisa
   77  cd
   78  ./countdown 12
   79  tail /etc/group
   80  usermod -aG profs anna
   81  tail /etc/group
   82  cd
   83  mkdir /data/profs /data/students
   84  mkdir -p /data/profs /data/students
   85  cd /data
   86  ls -l
   87  chown anna:profs profs
   88  chgrp student students/
   89  ls -l
   90  chmod 770 profs
   91  ls -l
   92  chmod g+w,o-rx students/
   93  ls -l
   94  cd
   95  chmod -x countdown
   96  cat countdown
   97  ./countdown
   98  ls -l countdown
   99  chmod +x countdown
  100  ls -l countdown
  101  history
  102  cd /data/profs/
  103  su - anna
  104  chmod g+s .
  105  ls -ld .
  106  su - anna
  107  su - anouk
  108  chmod +t .
  109  ls -ld .
  110  su - anouk
  111  su - anna
  112  history
  113  cd
  114  cd /home/linda
  115  touch rootfile
  116  ls -l
  117  su - linda
  118  umask
  119  vim /etc/bashrc
  120  pwd
  121  vim .bashrc
  122  ls -a
  123  vim .bash_profile
  124  cd
  125  lsblk
  126  poweroff
  127  lsblk
  128  cat /proc/partitions
  129  ./countdown 12
  130  lsblk
  131  fdisk /dev/sda
  132  lsblk
  133  mkfs.xfs /dev/sda3
  134  mount /dev/sda3 /mnt
  135  lsblk
  136  mount
  137  df -h
  138  cd /mnt
  139  touch hellofile
  140  umount /mnt
  141  lsof /mnt
  142  cd
  143  umount /mnt
  144  mount /dev/sda3 /mnt
  145  mount
  146  mount | grep '^/'
  147  mkdir /mountpoint
  148  vim /etc/fstab
  149  mount -a
  150  findmnt --verify
  151  reboot
  152  fdisk /dev/sda
  153  lsblk
  154  mkdir /ext4 /xfs
  155  mkfs.ext4 /dev/sda5
  156  mkfs.xfs /dev/sda6
  157  vim /etc/fstab
  158  fdisk /dev/sda
  159  reboot
  160  cat /etc/fstab
  161  lsblk
  162  blkid
  163  blkid | grep sda5 | awk '{ print $2 }'
  164  blkid | grep sda5 | awk '{ print $2 }' >> /etc/fstab
  165  vim fstab
  166  vim /etc/fstab
  167  reboot
  168  history
  169  cat /etc/fstab
  170  blkid
  171  mount | grep '^/'
  172  xfs_admin --help
  173  xfs_admin -L koeien /dev/sda5
  174  umount /dev/sda5
  175  xfs_admin -L koeien /dev/sda5
  176  vim /etc/fstab
  177  lsblk
  178  fdisk /dev/sda
  179  mkswap /dev/sda6
  180  vim /etc/fstab
  181  free -m
  182  swapon -a
  183  free -m
  184  history
  185  swapon -s
  186  fdisk /dev/sda
  187  reboot
  188  lsblk
  189  fdisk -l /dev/sda
  190  echo $(( 62914559 - 54530047 ))
  191  echo $(( 8384512 / 2 ))
  192  df -h
  193  ls
  194  vim /etc/systemd/system/stress1.service
  195  cp /etc/systemd/system/stress1.service /etc/systemd/system/stress2.service
  196  systemctl daemon-reload
  197  systemctl start stress1.service
  198  systemctl start stress2.service
  199  top
  200  echo 0 > /sys/bus/cpu/devices/cpu1/online
  201  top
  202  nice --help
  203  nice -n 10 dd if=/dev/zero of=/dev/null
  204  nice -n 10 dd if=/dev/zero of=/dev/null &
  205  nice -n -5 dd if=/dev/zero of=/dev/null &
  206  top
  207  history
  208  sysctl -a
  209  sysctl -a | wc
  210  systemctl status tuned
  211  ip a
  212  ip addr add dev ens160 10.0.0.24/16
  213  ip a
  214  ifconfig
  215  man ifconfig
  216  ip route show
  217  nmtui
  218  ip a
  219  ping nu.nl
  220  ./countdown 12
  221  vim /etc/bashrc
  222  rpm -qa
  223  rpm -qf /etc/dnsmasq.conf
  224  rpm -qc dnsmasq
  225  df -h
  226  dd if=/dev/sr0 of=/rhel9.iso bs=1M
  227  mkdir /repo
  228  echo "/rhel9.iso   /repo    iso9660    defaults   0 0" >> /etc/fstab
  229  mount -a
  230  ls /repo
  231  cd /repo/BaseOS/
  232  ls
  233  ls Packages/
  234  ls
  235  ls repodata/
  236  cd ../AppStream/
  237  ls
  238  cd
  239  cd /etc/yum.repos.d/
  240  ls
  241  vim baseos.repo
  242  dnf repolist
  243  vim appstream.repo
  244  dnf repolist
  245  vim appstream.repo
  246  pwd
  247  cat baseos.repo
  248  cat appstream.repo
  249  history | tail -15
  250  vim baseos.repo
  251  vim appstream.repo
  252  dnf install nmap
  253  vim appstream.repo
  254  vim baseos.repo
  255  dnf install tuned
  256  ls *
  257  ls
  258  pwd
  259  dnf list selinux*
  260  dnf search seinfo
  261  dnf search all seinfo
  262  dnf provides */Containerfile
  263  cd
  264  dnf groups list
  265  dnf group install "Virtualization Host"
  266  dnf history
  267  history
  268  history | tail -30
  269  history | tail -30 | head -25
  270  cat /etc/yum.repos.d/baseos.repo
  271  cat /etc/yum.repos.d/appstream.repo
  272  systemctl -t help
  273  systemctl list-units -t service
  274  systemctl cat stress1.service
  275  cd /etc/systemd/system/
  276  cp stress1.service sleep.service
  277  vim sleep.service
  278  systemctl start sleep.service
  279  systemctl status sleep.service
  280  systemctl status sshd
  281  dnf install httpd
  282  ls -l $(which dnf) $(which yum)
  283  systemctl status httpd
  284  systemctl start httpd
  285  systemctl status httpd
  286  systemctl enable httpd
  287  systemctl status httpd
  288  systemctl cat sshd.service
  289  systemctl cat httpd.service
  290  systemctl edit httpd.service
  291  export SYSTEMD_EDITOR=/usr/bin/vim
  292  systemctl edit httpd.service
  293  systemctl status httpd.service
  294  systemctl daemon-reload
  295  kill -9 38511
  296  systemctl status httpd.service
  297  vimtutor
  298  vim .bashrc
  299  ls -ld /etc/systemd/system /usr/lib/systemd/system
  300  ls -ld /etc/tuned /usr/lib/tuned
  301  systemctl show httpd.service
  302  man systemd.directives
  303  man systemd.unit
  304  systemctl list-dependencies
  305  history
  306  systemctl mask httpd
  307  systemctl status httpd
  308  systemctl stop httpd
  309  systemctl daemon-reload
  310  systemctl stop httpd
  311  systemctl unmask httpd
  312  systemctl stop httpd
  313  systemctl mask httpd
  314  systemctl start httpd
  315  history
  316  journalctl
  317  journalctl -o verbose
  318  journalctl -xb
  319  grep 'Storage=' /etc/systemd/journald.conf
  320  mkdir /var/log/journal
  321  systemctl list-unit-files journal*
  322  systemctl list-unit-files journal
  323  cd /var/log
  324  mkdir journal
  325  ls journal/
  326  systemctl restart systemd-journal-flush.service
  327  ls journal/
  328  cd /etc/logrotate.d/
  329  cd ..
  330  vim logrotate.conf
  331  cd
  332  dnf install tuned
  333  systemctl status tuned
  334  systemctl start tuned
  335  systemctl status tuned
  336  tuned-adm list
  337  tuned-adm pprofile balanced
  338  tuned-adm profile balanced
  339  tuned-adm list
  340  vim /usr/lib/tuned/balanced/tuned.conf
  341  tuned-adm profile virtual-guest
  342  top
  343  echo 1 > /sys/bus/cpu/devices/cpu1/online
  344  top
  345  lsblk
  346  fdisk /dev/sda
  347  pvcreate /dev/sda8
  348  pvs
  349  vgcreate vgdata /dev/sda8
  350  pvs
  351  vgs
  352  lvcreate -n lvdata -L 500M vgdata
  353  lvs
  354  vgs
  355  pvs
  356  mkfs.ext4 /dev/vgdata/lvdata
  357  vim /etc/fstab
  358  mount -a
  359  mkdir /lvdata
  360  mount -a
  361  mount
  362  ls -l /dev/mapper/vgdata-lvdata /dev/vgdata/lvdata
  363  history
  364  vgs
  365  vgdisplay
  366  xxd /dev/sda8 | less
  367  history