linfun aug23

[student@centos ~]$ history
    1  cat /etc/os-release
    2  exit
    3  vim countdown
    4  countdown
    5  echo $PATH
    6  ./countdown
    7  ls -l countdown
    8  chmod +x countdown
    9  ./countdown
   10  cat countdown
   11  history
   12  cat countdown
   13  whoami
   14  ls -l /root
   15  sudo ls -l /root
   16  rm -rf /root/*
   17  id
   18  cat /etc/group
   19  cut -d : -f 1 /etc/group
   20  tail -5 /etc/group
   21  cut -d : -f 1 /etc/group
   22  dnf install openssh
   23  sudo dnf install openssh
   24  sudo systemctl status sshd
   25  ip a
   26  ssh [email protected]
   27  history
   28  ssh localhost
   29  history
   30  ls
   31  LS
   32  ls --help
   33  ls --help | less
   34  ls -lrt
   35  whoami
   36  whoami --help
   37  id -un
   38  id
   39  hostname
   40  hostnamectl --help
   41  hostnamectl status
   42  hostnamectl hostname centos.example.com
   43  hostnamectl status
   44  date
   45  date +%d-%m-%y
   46  timedatactl
   47  timedatectl
   48  timedatectl --help
   49  timedatectl show
   50  timedatectl status
   51  uname
   52  uname --help
   53  uname -r
   54  uname -a
   55  hostnamectl status
   56  history
   57  passwd
   58  sudo passwd root
   59  touch hello
   60  ls -lrt
   61  touch /hello
   62  touch countdown
   63  ls -l
   64  last
   65  man passwd
   66  sudo passwd bob
   67  echo $?
   68  man passwd
   69  passwd --help
   70  man passwd
   71  man man
   72  man lvcreate
   73  man -k user
   74  man -k user |wc
   75  man -k user | grep 8
   76  man -k sander
   77  man man
   78  man apropos
   79  man mandb
   80  sudo mandb
   81  man ls
   82  pinfo '(coreutils) ls invocation'
   83  cd /usr/share/doc
   84  ls
   85  cd passwd/
   86  ls
   87  cd ../PackageKit/
   88  ls
   89  exit
   90  ./countdown 12
   91  ./countdown 15
   92  history
   93  man -k hostname
   94  man man
   95  man hostnamectl
   96  lvcreate --help
   97  lvcreate --help | less
   98  pwd
   99  ls
  100  ls -a
  101  ls -ld /etc
  102  ls -l /etc
  103  ls -l /etc/sudo*
  104  sudo ls -l /etc/sudo*
  105  sudo ls -ld /etc/sudo*
  106  cd /etc
  107  ls a
  108  ls a*
  109  ls -d a*
  110  ls -d a?[np]*
  111  cd
  112  pwd
  113  cd /etc
  114  mkdir new
  115  cd /tmp
  116  mkdir new
  117  rmdir
  118  rmdir new
  119  mkdir new
  120  touch new/file
  121  ls new
  122  rmdir new
  123  rm -rf new/
  124  touch new/file
  125  mkdir new
  126  touch new/file
  127  man hier
  128  pwd
  129  cd home
  130  cd /home
  131  pwd
  132  touch hello
  133  ls
  134  cd
  135  touch hello
  136  cd /var
  137  ls -l /var/log/messages
  138  ls -l log/messages
  139  cd tmp
  140  pwd
  141  ls -l log/messages
  142  ls -l ../log/messages
  143  ls -l ../../var/log/messages
  144  pwd
  145  cp /var/log/messages newdir
  146  sudo cp /var/log/messages newdir
  147  ls -ld newdir
  148  sudo rm newdir
  149  sudo cp /var/log/messages newdir/
  150  cp -a ~/.* .
  151  ls -a
  152  cp /etc/hosts .
  153  ls
  154  mv hosts whatever
  155  ls
  156  mv whatever ~/hosts
  157  ls
  158  ls ~
  159  history
  160  sudo poweroff
  161  ls
  162  ls -il countdown
  163  ln countdown teller
  164  ls -il countdown teller
  165  ln teller compteur
  166  ls -il countdown teller compteur
  167  echo "# this is comment" >> teller
  168  ls -il countdown teller compteur
  169  rm countdown
  170  ls -il countdown teller compteur
  171  ln teller countdown
  172  ln -s teller symcounter
  173  ls -il countdown teller compteur symcounter
  174  cat symcounter
  175  rm teller
  176  ls -il countdown teller compteur symcounter
  177  cat symcounter
  178  sudo ln /boot/vmlinuz-5.14.0-319.el9.x86_64 kernel
  179  lsblk
  180  sudo find / -name "hosts"
  181  sudo find / -name "hosts" 2>/dev/null
  182  sudo find / -name "*hosts*" 2>/dev/null
  183  sudo useradd linda
  184  sudo find / -user "linda"
  185  sudo find / -type f -user "linda"
  186  history
  187  sudo find / -user "linda"
  188  sudo find / -type f -user "linda"
  189  sudo mkdir /root/linda; sudo find / -type f -user "linda" -exec cp {} /root/linda/ \;
  190  sudo ls /root/linda
  191  sudo ls -a /root/linda
  192  history
  193  sudo tar -cvf my_archive.tar /etc
  194  ls -l
  195  sudo tar -czvf my_archive.tar.gz /etc
  196  ls -l
  197* sudo tar -cjvf my_archive.tar.bz2 /etc
  198  ls -l
  199  tar -tvf my_archive.tar.gz
  200  tar -xvf my_archive.tar.gz
  201  ls
  202  tree etc
  203  history
  204  ls -l
  205  sudo tar -cjvf my_archive.tar.bz2 /etc
  206  history
  207  ls -l
  208  file my_archive.tar.gz
  209  history
  210  sudo tar -czvf my_archive.tar.gz /etc
  211  ls -l
  212  file my_archive.tar.gz
  213  mv my_archive.tar my_archive
  214  file my_archive
  215  history
  216  ls
  217  history
  218  ls -l /etc
  219  ls -l /home
  220  history
  221  mkdir /tmp/files
  222  cd /tmp/files
  223  mkdir pictures photos videos
  224  mkdir -p /tmp/newfiles/{pictures,photos,videos}
  225  tree /tmp/newfiles/
  226  ls
  227  cp /etc/[a-c]* .
  228  ls
  229  mv c* videos/
  230  mv * photos/
  231  ls
  232  ls photos/
  233  mv photos/[vp]* .
  234  ls
  235  man find
  236  find /etc -size -1000c
  237  find /etc -size -1000c -exec ls -l {} \;
  238  find /etc -size -1000 c -exec ls -l {} \;
  239  ls -l /etc/18.txt
  240  ls -l /etc/brltty/Input/bd/18.txt
  241  man find
  242  find /etc -size -1000c -exec cp {} /tmp/files/pictures/ \;
  243  ln -s /var .
  244  ls
  245  tar -czvf homes.tgz /home
  246  sudo tar -czvf homes.tgz /home
  247  mkdir ../archive
  248  tar -xvf homes.tgz -C ../archive/
  249  ls ../archive/home/
  250  history
  251  cd videos/
  252  ls
  253  rm *
  254  dd if=/dev/zero of=smallfile1 bs=1 count=500
  255  dd if=/dev/zero of=smallfile2 bs=1 count=600
  256  dd if=/dev/zero of=bigfile2 bs=1 count=6000
  257  dd if=/dev/zero of=bigfile1 bs=1 count=5000
  258  ls -l
  259  find . -size -1000c
  260  find . -size +1000c
  261  history
  262  cd
  263  vim
  264  vimtutor
  265  nano vicmd
  266  sudo less /var/log/messages
  267*
  268  ps aux | head
  269  ps aux | head -5
  270  head -5 /etc/passwd
  271  head -5 /etc/passwd | tail -1
  272  cat vicmd
  273  tac vicmd
  274  grep file *
  275  cd /etc
  276  grep linda *
  277  grep linda * 2>/dev/null
  278  grep -l linda * 2>/dev/null
  279  grep -il linda * 2>/dev/null
  280  sudo grep -A5 -i 'root' /etc/ssh/sshd_config
  281  sudo grep -B5 -i 'root' /etc/ssh/sshd_config
  282  sudo grep -C5 -i 'root' /etc/ssh/sshd_config
  283  ps aux | grep ssh
  284  ps aux | grep ssh | grep -v grep
  285  history
  286  cd
  287  vim regexfile
  288  grep '^l' regexfile
  289  grep 'anna$' regexfile
  290  vim regexfile
  291  grep 'lea\b' regexfile
  292  grep 'bo*t' regexfile
  293  grep 'b.*t' regexfile
  294  vim regexfile
  295  grep 'b.*t' regexfile
  296  grep '^b.*t$' regexfile
  297  grep '^b.+t$' regexfile
  298  grep -E '^b.+t$' regexfile
  299  grep -E '^b.?t$' regexfile
  300  grep 'bo\{3\}t' regexfile
  301  grep '^$' regexfile
  302  grep '^.$' regexfile
  303  grep '^.*$' regexfile
  304  grep '.*' regexfile
  305  history
  306  cat regexfile
  307  tail -5 /etc/passwd
  308  cut -d : -f 2 /etc/passwd
  309  tail -5 /etc/passwd
  310  cut -d : -f 3 /etc/passwd | sort | less
  311  cut -d : -f 3 /etc/passwd | sort -n | less
  312  echo hello | tr [:a-z:] [:A-Z:]
  313  echo hello | tr [:lower:] [:upper:]
  314  echo hello | tr [a-z] [A-Z]
  315  echo hello | tr [a-k] [l-z]
  316  sed -n 5p /etc/passwd
  317  sed -i s/old/new/g regexfile
  318  man sed
  319  for i in {1..100}; do echo hello > file${i}; done
  320  ls
  321  cat file60
  322  for i file*; do sed -i 's/hello/goodbey/' ${i}; done
  323  for i file* ; do sed -i 's/hello/goodbey/' ${i}; done
  324  for i * ; do sed -i 's/hello/goodbey/' ${i}; done
  325  for i in file* ; do sed -i 's/hello/goodbey/' ${i}; done
  326  cat file81
  327  awk -F : '{ print $4 }' /etc/passwd
  328  awk -F : '/linda/ { print $4 }' /etc/passwd
  329  awk -F : '$4 > 999 { print $1 }' /etc/passwd
  330  awk -F : '$4 < 999 { print $1 }' /etc/passwd
  331  ls > example
  332  cat example
  333  who > example
  334  cat example
  335  id >> example
  336  grep root /etc/*
  337  grep root /etc/* 2>/dev/null
  338  grep root /etc/* &>/dev/null
  339  sort < /etc/service
  340  sort < /etc/services
  341  sort /etc/services
  342  history
  343  sudo sh -c "echo password | passwd --stdin linda"
  344  history
  345  history -d 342
  346  history
  347  touch ihiuihiguiguygyufuyftyftyfytdftydftyddftyfyuguiguihuhigyufuyufytfuytfuty
  348  rm ihiuihiguiguygyufuyftyftyfytdftydftyddftyfyuguiguihuhigyufuyufytfuytfuty
  349  echo $HISTSIZE
  350  sudo dnf install bash-completion
  351  env
  352  echo $PATH
  353  alias
  354  ps aux | grep ssh
  355  alias
  356  alias sander='echo hello'
  357  sander
  358  sleep infinity
  359  vim /etc/profile
  360  cd /etc/profile.d/
  361  ls
  362  less colorls.sh
  363  vim /etc/bashrc
  364  cd
  365  ls -a
  366  vim .bashrc
  367  bash
  368  vim .bash_logout
  369  sudo dd if=/dev/zero of=/dev/null
  370  bg
  371  sudo top
  372  history
  373  sleep 1000
  374  bg
  375  sleep 1000 &
  376  ps aux | grep 11319
  377  jobs
  378  fg 1
  379  kill 11319
  380  ps aux | less
  381  kill 791
  382  ps faux | less
  383  ps -e -o pid,args --forest
  384  ps aux --sort pmem | less
  385  top
  386  sudo dd if=/dev/zero of=/dev/null &
  387  top
  388  sudo -i
  389  sudo dnf list selinux*
  390  sudo dnf install selinux-policy-doc
  391  sudo dnf search nmap
  392  sudo dnf install nmap
  393  touch newfile
  394  ls -l newfile
  395  id
  396  sudo id linda
  397  sudo usermod -aG wheel linda
  398  sudo groupadd students
  399  sudo usermod -aG students linda
  400  sudo mkdir -p /data/students
  401  ls -ld /data/students
  402  sudo chgrp students /data/students
  403  ls -ld /data/students
  404  sudo chmod 770 /data/students
  405  ls -ld /data/students
  406  ip a
  407  echo "echo hello world" > myscript
  408  ./myscript
  409  chmod +x myscript
  410  ls -l myscript
  411  ./myscript
  412  ip route show
  413  cat /etc/resolv.conf
  414  man ifconfig
  415  lsblk
  416  sudo mount /dev/sdb4 /mnt
  417  lsblk
  418  history