LutH prerelease day3

    1  grub2-set-password
    2  usermod -aG wheel student
    3  reboot
    4  xxd -l 512 /dev/sda
    5  dnf provides */grubx64.efi
    6  man dnf
    7  rm /boot/efi/EFI/redhat/grubx64.efi
    8  cd /boot/efi/EFI/centos/
    9  ls
   10  rm -f grubx64.efi
   11  reboot
   12  lsblk
   13  xxd -l 512 /dev/sda
   14  ls
   15  cd trouble/
   16  ls
   17  ./countdown 10
   18  cd /boot/efi/
   19  ls
   20  cd EFI
   21  ls
   22  tree
   23  efibootdump
   24  efibootmgr
   25  reboot
   26  free -
   27  free -m
   28  cd /etc/default/
   29  vim grub
   30  cd /boot/grub2
   31  ls -l
   32  cd ../
   33  cd efi/EFI/centos/
   34  ,s
   35  ls
   36  ls -l grub.cfg
   37  #grub2-mkconfig -o /boot/grub2/grub.cfg
   38  cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.bak
   39  grub2-mkconfig -o /boot/grub2/grub.cfg
   40  reboot
   41  free -m
   42  systemctl status mount.target
   43  systemctl status boot.mount
   44  mount | grep boot
   45  cat /etc/fstab
   46  cd /run/systemd/generator/
   47  ls
   48  cp boot-efi.mount /etc/systemd/system/
   49  cp -- -.mount /etc/systemd/system
   50  cd /etc/systemd/system/
   51  vim boot-efi.mount
   52  systemctl enable --now boot-efi.mount
   53  systemctl list-dependencies
   54  vim -- -.mount
   55  systemctl enable -- -.mount
   56  vim /etc/fstab
   57  reboot
   58  mount -o remount,rw /
   59  systemctl start multi-user.target
   60  touch hhh
   61  cat /etc/fstab
   62  vim /etc/default/grub
   63  ls -l /boot/grub2/grub.cfg
   64  grub2-mkconfig -o /boot/grub2/grub.cfg
   65  reboot
   66  history
   67  systemctl list-unit-files fstrim*
   68  systemctl status fstrim.service
   69  systemctl enable --now fstrim.timer
   70  systemctl cat fstrim.timer
   71  man systemd.time
   72  man systemd.timer
   73  systemd-analyze security
   74  systemd-analyze security sshd.service
   75  systemd-analyze blame
   76  history
   77  systemctl list-units -t target
   78  systemctl list-dependencies
   79  dnf install -y httpd vsftpd
   80  systemctl status httpd
   81  systemctl status vsftpd
   82  systemctl edit httpd
   83  systemctl cat httpd
   84  ps aux | grep ftp
   85  ps aux | grep http
   86  systemctl start httpd
   87  ps aux | grep http
   88  ps aux | grep ftp
   89  systemctl status vsftpd
   90  journalctl -u vsftpd
   91  systemctl list-dependencies
   92  systemctl edit atd.service
   93  systemctl daemon-reload
   94  systemctl list-dependencies
   95  cd /etc/systemd/
   96  ls
   97  cd system/
   98  ls
   99  cd multi-user.target.wants/
  100  ls -l
  101  vim ~/.bashrc
  102  source .bashrc
  103  source ~/.bashrc
  104  systemctl edit --full inplace sshd.service
  105  systemctl edit --full sshd.service
  106  systemd-analyze dot
  107  systemd-analyze plot > ~/boot_timing.svg
  108  systemd-analyze plot > /tmp/boot_timing.svg
  109  cd
  110  systemctl show vsftpd.service | grep RequiredBy
  111  ls
  112  git clone https://github.com/sandervanvugt/luth
  113  cd luth
  114  ls
  115  git pull
  116  vim stress1.service
  117  vim stress2.service
  118  cp stres* /etc/systemd/system/
  119  systemctl start stress1
  120  systemctl start stress2
  121  top
  122  poweroff
  123  systemctl start stress1
  124  systemctl start stress2
  125  top
  126  echo 0 > /sys/bus/cpu/devices/cpu1/online
  127  top
  128  systemctl set-property system.slice CPUShares=4096
  129  top
  130  killall dd
  131  kill 3215
  132  top
  133  kill -9 3215
  134  top
  135  systemctl set-property --runtime httpd.service CPUShares=2048
  136  systemctl cat httpd
  137  systemctl set-property httpd.service MemoryMax=16M
  138  systemctl cat httpd
  139  systemctl status httpd.service
  140  systemd-cgls
  141  systemd-cgtop
  142  systemctl start httpd
  143  mount | grep cg
  144  cd /sys/fs/cgroup/system.slice/httpd.service/
  145  ls
  146  cat memory.max
  147  echo $(( 16777216 * 4 )) > memory.max
  148  cat memory.max
  149  systemctl status httpd
  150  ls
  151  reboot
  152  systemctl status httpd
  153  systemctl start httpd
  154  systemctl status httpd
  155  ls /run
  156  ls /run/systemd/
  157  cd /etc/systemd/system/httpd.service.d/
  158  ls
  159  cat override.conf
  160  cd
  161  systemctl cat sound.target
  162  ls /etc/systemd/system/sockets.target.wants
  163  ls -l /etc/systemd/system/sockets.target.wants
  164  systemctl cat multi-user.target
  165  systemctl isolate multi-user.target
  166  systemctl isolate graphical.target
  167  cp /usr/lib/systemd/system/graphical.target /etc/systemd/system/sander.target
  168  vim /etc/systemd/system/sander.target
  169  cd /etc/systemd/system
  170  cp stress1.service sleep.service
  171  vim sleep.service
  172  systemctl daemon-reload
  173  systemctl enable --now sleep.service
  174  ls sander.target.wants/
  175  systemctl set-default sander.target
  176  reboot
  177  systemctl cat sander.target
  178  ls /etc/systemd/system/sander.target.wants/
  179  vim /etc/systemd/system/sander.target
  180  reboot
  181  systemctl get-default
  182  systemctl list-dependencies
  183  systemctl set-default graphical.taget
  184  systemctl set-default graphical.target
  185  reboot
  186  history
  187  less /proc/meminfo
  188  free -m
  189  echo $(( 1498 + 687 ))
  190  less /proc/meminfo
  191  sysctl -a | grep dirty
  192  man proc
  193  free -m
  194  echo 3 > /proc/sys/vm/drop_caches
  195  free -m
  196  history -w
  197  cd luth/
  198  ./countdown 30
  199  history
  200  less /proc/meminfo
  201  free -m
  202  echo $(( 1498 + 687 ))
  203  less /proc/meminfo
  204  sysctl -a | grep dirty
  205  man proc
  206  free -m
  207  echo 3 > /proc/sys/vm/drop_caches
  208  free -m
  209  history -w
  210  sync
  211  reboot
  212  cd luth/
  213  ./countdown 11
  214  top
  215  grep ctive /proc/meminfo
  216  vmstat 2 10
  217  vmstat 2 100
  218  top
  219  dstat
  220  dnf provides */dstat
  221  dnf install -y pcp-system-tools
  222  dstat
  223  dstat -s
  224  vmstat 2 5
  225  history
  226  free -m
  227  dh -h
  228  df -h
  229  dd if=/dev/zero of=/swapfile bs=1M count=1024
  230  chmod 600 /swapfile
  231  mkswap /swapfile
  232  free -m
  233  swapon /swapfile
  234  df -h
  235  free -m
  236  swapon -s
  237  reboot
  238  grep -i huge /proc/meminfo
  239  ssh sander@192.168.52.132
  240  top
  241  cat /proc/meminfo
  242  cat /proc/meminfo | grep omitt
  243  cat /proc/meminfo | grep omit
  244  cat /proc/meminfo | grep ommit
  245  top
  246  vim /etc/sysctl.conf
  247  reboot
  248  sysctl -a | grep overcom
  249  vim /etc/sysctl.conf
  250  reboot
  251  history
  252  ssh sander@192.168.52.132
  253  history
  254  grep Commit /proc/meminfo
  255  ps aux | grep nome-s
  256  cd /proc/2077
  257  ls
  258  cat oom_score
  259  cd
  260  top
  261  echo -200 > /proc/2077/oom_score_adj
  262  echo -200 > /proc/3699/oom_score_adj
  263  history -w
  264  history
  265  ssh sander@192.168.52.132
  266  history
  267  grep Commit /proc/meminfo
  268  ps aux | grep nome-s
  269  cd /proc/2077
  270  ls
  271  cat oom_score
  272  cd
  273  top
  274  echo -200 > /proc/2077/oom_score_adj
  275  echo -200 > /proc/3699/oom_score_adj
  276  history -w
  277  sync
  278  echo f .
  279  echo f > /proc/sysrq-trigger
  280  dmesg
  281  grep Slab /proc/meminfo
  282  slabinfo
  283   slabtop
  284  cd /proc/sys/vm/
  285  ls
  286  cd
  287  dnf install -y zsh
  288  echo $$
  289  ps aux | grep 2811
  290  zsh
  291  exho $$
  292  echo $$
  293  exec zsh
  294  history
  295  systemctl start httpd
  296  ps -efl | egrep -i httpd
  297  ps -ef | egrep -i httpd
  298  ps -efl | less
  299  ps -efL | less
  300  ps -efT | less
  301  top
  302  ps -T -p $(pidof httpd)
  303  ps -T -p $(pidof httpd) | less
  304  top -H
  305  top
  306  top -H
  307  dnf install epel-release
  308  dnf install -y htop
  309  htop
  310  man 7 signals
  311  man 7 signal
  312  sysctl -a | grep pid
  313  cd luth/
  314  ls
  315  cat zombie.c
  316  ls
  317  gcc -o zombie zombie.c
  318  ./zombie &
  319  vim zombie.c
  320  rm zombie.c
  321  gcc -o zombie zombie.c
  322  git pull
  323  cd ..
  324  cd luth/
  325  git revert
  326  git status
  327  git revert zombie.c
  328  git restore zombie.c
  329  ls
  330  rm -f zombie
  331  gcc -o zombie zombie.c
  332  ./zombie &
  333  ps aux | grep defunc
  334  kill -9 1073
  335  ps aux | grep defunc
  336  ps -A -ostat,pid,ppid | grep Z
  337  kill -s SIGCHLD 1041
  338  ps aux | grep defunc
  339  ps aux | grep 1041
  340  kill -s HUP 1041
  341  ps aux | grep defunc
  342  history -w
  343  cd luth/
  344  ./countdown 12
  345  top
  346  ps aux | grep defunc
  347  top
  348  man chrt
  349  chrt -i -p 50 dd if=/dev/zero of=/dev/null &
  350  dd if=/dev/zero of=/dev/null
  351  bg
  352  top
  353  man chrt
  354  chrt -i -p 50 6668
  355  chrt -i -p 10 6668
  356  chrt -i -p --max 6668
  357  chrt -i -p 0 6668
  358  top
  359  history
  360  chrt --max
  361  top
  362  chrt --max
  363  chrt -r 50 sleep infinity
  364  bg
  365  chrt -r 50 dd if=/dev/zero of=/dev/null &
  366  top
  367  history
  368  chrt --max
  369  dd if=/dev/zero of=/dev/null &
  370  top
  371  echo 0 > /sys/bus/cpu/devices/cpu1/online
  372  top
  373  pidod dd
  374  pidof dd
  375  renice -5 $(pidof dd | awk '{ print $1 }')
  376  renice -5 $(pidof dd | awk '{ print $2 }')
  377  top
  378  chrt -r 50 dd if=/dev/zero of=/dev/null &
  379  top
  380  ls -lrt /tmp
  381  mkfifo myfifo
  382  ls -l myfifo
  383  cat myfifo
  384  ls -l
  385  unlink myfifo
  386  cd luth/
  387  ls
  388  cat dbus-commands.sh
  389  qdbus --system --literal org.freedesktop.NetworkManager
  390  dnf provides */qdbus
  391  cat dbus-commands.sh
  392  dbus-send --system --print-reply             --dest=org.freedesktop.NetworkManager             /org/freedesktop/NetworkManager             org.freedesktop.DBus.Properties.Get             string:"org.freedesktop.NetworkManager"             string:"NetworkingEnabled"
  393  cat dbus-commands.sh
  394  dbus-send --system --print-reply             --dest=org.freedesktop.NetworkManager             /org/freedesktop/NetworkManager             org.freedesktop.DBus.Properties.Get             string:"org.freedesktop.NetworkManager"             string:"ActiveConnections"
  395  cat dbus-commands.sh
  396  vim dbus-commands.sh
  397  dbus-send --system --print-reply             --dest=org.freedesktop.NetworkManager             /org/freedesktop/NetworkManager/ActiveConnection/2             org.freedesktop.DBus.Properties.Get             string:"org.freedesktop.NetworkManager.Connection.Active"             string:"Devices"
  398  dbus-send --system --print-reply             --dest=org.freedesktop.NetworkManager             /org/freedesktop/NetworkManager/Devices/2             org.freedesktop.DBus.Properties.Get             string:"org.freedesktop.NetworkManager.Device"             string:"Interface"
  399  podman run -it nginx sh
  400  podman run -d nginx
  401  podman ps
  402  podman exec -it boring_villani sh
  403  systemctl list-unit-files --all | grep -i dbus
  404  systemctl cat dbus-org.freedesktop.timedate1.service
  405  strace ls
  406  strace ls | less
  407  strace -c ls | less
  408  strace -c ls
  409  ls *
  410  echo *
  411  ls -d *
  412  strace -c ls -d *
  413  strace -c echo *
  414  strace ls 2> lsout.txt
  415  less lsout.txt
  416  man strace
  417  strace ls |& grep mmap
  418  strace ls 2>&1 | grep mmap
  419  history
  420  history | less
  421  getcap /bin/ping
  422  strace /bin/ping -c 1 127.0.0.1 |& less
  423  man capabilities
  424  capget /bin/ping
  425  setcap cap_net_raw-ep /bin/ping
  426  capget /bin/ping
  427  getcap /bin/ping
  428  reboot
  429  getcap /bin/ping
  430  setcap cap_net_raw=ep /bin/ping
  431  getcap /bin/ping
  432  exit
  433  ps aux | grep http
  434  systemctl start httpd
  435  ps aux | grep http
  436  cd /proc/3232
  437  less status
  438  cd /proc/3232
  439  less maps
  440  pmap --help
  441  pmap 3232
  442  cd
  443  cat /proc/$(pido sshd)/status
  444  cat /proc/$(pidof sshd)/status
  445  pmap $(pidof sshd)
  446  pmap -X $(pidof sshd)
  447  pmap -X $(pidof sshd) | less
  448  ls -l /bin/ping
  449  stat /bin/ping
  450  dnf install nmap
  451  getcap /usr/bin/nmap
  452  man capabilities
  453  setcap cap_net_admin+ep /usr/bin/nmap
  454  getcap /usr/bin/nmap
  455  exit
  456  setcap cap_net_admin=-ep /usr/bin/nmap
  457  exit
  458  ps Zaux | grep http
  459  ls -Z /var/www
  460  exit
  461  chvt 2
  462  chvt 2
  463  ldd $(which login)
  464  cd /etc/pam.d/
  465  ls
  466  less login
  467  vim system-auth
  468  vim /etc/securetty
  469  chvt 5
  470  vim system-auth
  471  find / -name "pam_deny.so"
  472  cd /usr/lib64/security/
  473  ls
  474  man pam_securetty
  475  vim /etc/pam.d/login
  476  chvt 6
  477  ldd /usr/bin/*
  478  ldd /usr/bin/ldconfig
  479  ldd $(which ldconfig)
  480  ls /sys/firmware/
  481  mount | grep efi
  482  cd
  483  history
  484  df -h
  485  dd if=/dev/zero of=/disk.img bs=1M count=1024
  486  losetup loop0 /disk.img
  487  mount /disk.img /mnt
  488  mkfs.ext4 /disk.img
  489  mount /disk.img /mnt
  490  cd /etc/hosts /mnt
  491  cp /etc/hosts /mnt
  492  df -h
  493  poweroff
  494  fdisk /dev/sda
  495  vgcreate vgdata /dev/sda4
  496  lvcreate -n lvdata vgdata -l 90%FREEE
  497  lvcreate -n lvdata vgdata -l 90%FREE
  498  lvs
  499  mkfs.ext4 /dev/vgdata/lvdata
  500  mount /dev/mapper/vgdata-lvdata /mnt
  501  cp /etc/b* /mnt
  502  lvcreate -s -n lvdatasnap /dev/vgdata/lvdata -l 5%FREE
  503  lvs
  504  rm /mnt/b*
  505  rm /mnt/b* -f
  506  mkdir /snap
  507  mount /dev/vgdata/lvdatasnap /snap
  508  ls /snap
  509  lvs
  510  umount /snap
  511  lvremove /dev/mapper/vgdata-lvdatasnap
  512  history
  513  lvs vgdata
  514  mount
  515  cp /etc/c* /mnt
  516  vgcfgbackup -f /tmp/vgbackup-$(date +%d-%m-%y)
  517  cat /tmp/vgbackup-22-11-23
  518  umount /mnt
  519  lvremove /dev/vgdata/lvdata
  520  lvs
  521  vgchange -a n vgdata
  522  vgcfgrestore -f /tmp/vgbackup-22-11-23
  523  vgcfgrestore -f /tmp/vgbackup-22-11-23 vgdata
  524  vgchange -a y vgdata
  525  lvs
  526  vim /etc/lvm/lvm.conf
  527  man vgexport
  528  man vgimport
  529  fdisk -l /dev/sda
  530  xxd /dev/sda3 | less
  531  lvs
  532  ls /dev/mapper/
  533  ls -l /dev/mapper/
  534  dmsetup ls
  535  dmsetup info
  536  poweroff
  537  lsblk
  538  dmsetup create mydevice --table '0 419304 linear /dev/sdb 0'
  539  dmsetup ls
  540  mkfs.ext4 /dev/mapper/mydevice
  541  mount /dev/mapper/mydevice /mnt
  542  cd /mnt
  543  echo password > password.txt
  544  cd
  545  umount /mnt
  546  reboot
  547  ls /dev/mapper/
  548  dmsetup create mydevice --table '0 419304 linear /dev/sdb 0'
  549  mount /dev/mapper/mydevice /mnt
  550  ls /mnt
  551  cryptsetup luksFormat /dev/mapper/mydevice
  552  umount /mnt
  553  cryptsetup luksFormat /dev/mapper/mydevice
  554  xxd /dev/mapper/mydevice | less
  555  cryptsetup luksOpen /dev/mapper/mydevice secret
  556  ls /dev/mapper/
  557  dmsetup ls
  558  mkfs.ext4 /dev/mapper/secret
  559  mount /dev/mapper/secret /mnt
  560  echo '!@#123qwe' > /mnt/mvspw.txt
  561  history
  562  xfs_db /dev/sda1
  563  umount /boot
  564  lsof /boot
  565  umount /boot/efi
  566  umount /boot
  567  xfs_db /dev/sda1
  568  xfs_db /dev/sda2
  569  mount | grep ext4
  570  tune2fs -l /dev/mapper/secret
  571  tune2fs -l /dev/mapper/secret | less
  572  debugfs /dev/mapper/secret
  573  ls -l /mnt
  574  ls -li /mnt
  575  debugfs /dev/mapper/secret
  576  stat /mnt/mvspw.txt
  577  echo 1 one.txt
  578  echo 1 > one.txt
  579  ls -l one.txt
  580  ls -lsh one.txt
  581  dd if=/dev/zero of=/sparsefile.img bs=1 count=0 seek=10G
  582  ls -lsh /sparsefile.img
  583  mkfs.xfs -b size=2048 /sparsefile.img
  584  mount -o loop /sparsefile.img /mnt
  585  cp /etc/hosts /mnt
  586  ls -lsh /mnt/hosts
  587  dd if=/dev/urandom of=/mnt/bigfile bs=1M count=10
  588  ls -lsh /mnt
  589  ls -lsh /sparsefile.img
  590  ls -lsh /var/log/lastlog
  591  man rsync
  592  man cp
  593  dd if=/dev/zero of=/sander.img bs=1M count=1024
  594  ls -lsh /sander.img
  595  fallocate --dig-holes /sander.img
  596  ls -lsh /sander.img
  597  history
  598  systemctl cat chronyd.service
  599  lsns
  600  echo test > /tmp/test
  601  chmod 600 /tmp/test
  602  ls -l /tmp/test
  603  podman run -it -v /tmp/test:/tmp/test:Z --uidmap 0:100000:5000 fedora sh
  604  podman top --latest user huser
  605  ps faux | less
  606  unshare --fork --pid --mount-proc zsh
  607  mount | grep cgroup
  608  cd /sys/fs/cgroup/
  609  ls
  610  mkdir mycgroup
  611  ls mycgroup/
  612  cd mycgroup/
  613  dd if=/dev/zero of=/dev/null & echo $! > cgroup.procs
  614  cat cgroup.procs
  615  echo 50 > cpu.weight
  616  echo 0 >/sys/bus/cpu/devices/cpu1/online
  617  dd if=/dev/zero of=/dev/null &
  618  top
  619  history
  620  cat cgroup.procs
  621  echo 400 > cpu.weight
  622  top
  623  cd
  624  history