linfun day2 feb21

[root@centos2 mnt]# history
    1  ls
    2  cd /proc
    3  ls
    4  cat cpuinfo
    5  cd sys
    6  ls
    7  cd net/
    8  ls
    9  cd ipv6/
   10  ls
   11  cd conf/
   12  ls
   13  cd default/
   14  ls
   15  pwd
   16  cat disable_ipv6
   17  ip a
   18  echo 1 > disable_ipv6
   19  ip a
   20  ls
   21  cd ..
   22  ls
   23  cd all/
   24  echo 1 > disable_ipv6
   25  ip a
   26  history
   27  pwd
   28  exit
   29  ls -il /etc/hosts /home/student/hosts
   30  ls -il /etc/hosts /home/student/myhosts
   31  echo hello >> /etc/hosts
   32  ls -il /etc/hosts /home/student/myhosts
   33  ln -s /home/student/myhosts whatever
   34  ls -il /etc/hosts /home/student/myhosts whatever
   35  rm /home/student/myhosts
   36  ls -il /etc/hosts /home/student/myhosts whatever
   37  cat whatever
   38  ls
   39  \ls
   40  alias
   41  unalias ls
   42  ls
   43  alias help='rm -rf /'
   44  help
   45  which vi
   46  which vim
   47  exit
   48  mkdir linda; find / -user linda -exec cp {} /root/linda \;
   49  exit
   50  tar -cvf myarchive.tar /home /etc
   51  ls
   52  ls -l myarchive.tar
   53  tar -tvf myarchive.tar | less
   54  tar -xvf myarchive.tar
   55  ls
   56  rm -rf etc home
   57  tar -xvf myarchive.tar -C /tmp
   58  ls /tmp
   59  tar -czvf gziparchive.tgz /home /etc
   60  ls -l
   61  tar -cjvf gziparchive.tgz /home /etc
   62  ls -l
   63  tar -cJvf gziparchive.tgz /home /etc
   64  ls -l
   65  head /etc/passwd
   66  head /etc/passwd | tail -1
   67  sudo apt install vim
   68  echo $EDITOR
   69  export EDITOR=/usr/bin/nano
   70  visudo
   71  export EDITOR=/usr/bin/vim
   72  wc /etc/passwd
   73  cat /etc/passwd
   74  head /etc/passwd
   75  head -2 /etc/passwd
   76  tail -2 /etc/passwd
   77  vim myfile
   78  cat myfile
   79  tac myfile
   80  cd /etc/
   81  grep linda *
   82  grep linda * 2>/dev/null
   83  ps aux | grep ssh
   84  ps aux | grep ssh
   85  ps aux | grep ssh | grep -v grep
   86  grep root * 2>/dev/null
   87  grep -l root * 2>/dev/null
   88  grep -lR root * 2>/dev/null
   89  grep --help | grep r
   90  grep --help
   91  grep 'a*' a*
   92  exit
   93  cd /home/linda
   94  vim playme
   95  chmod +x playme
   96  su - linda
   97  exit
   98  history
   99  history -d 98
  100  history
  101  exit
  102  nmcli connection modify ens33 +ipv4.dns 8.8.4.4
  103  nmcli connection up ens33
  104  nmtui
  105  exit
  106  lsblk
  107  umount /dev/sdb1
  108  mount /dev/sdb1 /mnt
  109  cd /mnt
  110  ls
  111  systemctl status sshd
  112  vim follow-up.txt
  113  history


######
[student@centos2 ~]$ history
    1  w
    2  whoami
    3  ls
    4  ls -l
    5  cd desktop
    6  cd Desktop/
    7  ls
    8  cd ..
    9  chvt 3
   10  sudo chvt 3
   11  history
   12  ls
   13  useradd linda
   14  sudo useradd linda
   15  sudo passwd linda
   16  su - linda
   17  id
   18  sudo usermod -aG wheel linda
   19  id linda
   20  sudo visudo
   21  history
   22  su - linda
   23  sudo apt install vim
   24  sudo dnf install vim
   25  sudo yum install vim
   26  vim countdown
   27  countdown 12
   28  ./countdown 12
   29  ls -l countdown
   30  chmod +x countdown
   31  ./countdown 12
   32  vimtutor
   33  ./countdown 13
   34  history
   35  nano countdown
   36  vim countdown
   37  history
   38  echo $PATH
   39  cp countdown /usr/local/bin/
   40  sudo cp countdown /usr/local/bin/
   41  countdown 0
   42  history
   43  cat countdown
   44  ip a
   45  sudo nmtui
   46  ip a
   47  sudo apt install openssh-server
   48  sudo systemctl status openssh-server
   49  sudo systemctl status sshd
   50  ip a
   51  chsh --help
   52  chsh -l
   53  whoami
   54  w
   55  hostname
   56  date
   57  date --help | less
   58  date --help
   59  date --help | less
   60  uname
   61  uname --help
   62  uname --all
   63  passwd
   64  touch mynewfile
   65  cd /usr
   66  touch newfile
   67  cd
   68  ls -l
   69  touch countdown
   70  ls -l countdown
   71  last
   72  countdown 12
   73  man useradd
   74  man semanage-fcontext
   75  man -k user
   76  man man
   77  man apropos
   78  man mandb
   79  man man
   80  sudo mandb
   81  man -k user
   82  man -k user | wc
   83  man -k user
   84  man -k user | grep 8
   85  man -k user | grep 8 | wc
   86  history
   87  man uname
   88  man 2 uname
   89  man -a uname
   90  man passwd
   91  man 5 passwd
   92  man ls
   93  pinfo '(coreutils) ls invocation'
   94  info '(coreutils) ls invocation'
   95  cd /etc
   96  ls -l
   97  ls | wc
   98  ls
   99  ls -l grub2.cfg
  100  history
  101  ls -lrt
  102  cat shadow
  103  sudo cat shadow
  104  echo $PATH
  105  cd
  106  ls
  107  ls -a
  108  echo hello > .hello
  109  ls
  110  ls -a
  111  cat .hello
  112  cd /etc
  113  ls
  114  ls a*
  115  ls -d a*
  116  ls -d a*/b*
  117  ls -d a*/*
  118  ls -d a*/a*
  119  ls a?????
  120  ls ?????
  121  ls -d ?????
  122  ls -d g????
  123  ls ??a* -d
  124  ls ??[ab]* -d
  125  ls ??[a-e]* -d
  126  ls -d a*
  127  ls a* -d
  128  cd
  129  mkdir blah
  130  cp /etc/hosts blah/
  131  rmdir blah
  132  rm -rf blah/
  133  history
  134  cd /
  135  ls
  136  ls -l
  137  man hier
  138  cd usr
  139  ls
  140  ldd /usr/bin/passwd
  141  ldd /usr/bin/ls
  142  ls
  143  ls local
  144  cd src
  145  ls
  146  cd kernels/
  147  ;ls
  148  ls
  149  cd /
  150  cd /usr
  151  du -hs
  152  cd /
  153  ls
  154  cd /var
  155  ls
  156  cd log
  157  ls
  158  ls -l
  159  ls -lrt
  160  sudo journalctl
  161  cd /etc
  162  ls
  163  history
  164  tail /etc/passwd
  165  cd /
  166  ls
  167  cd boot
  168  ls -l
  169  cd
  170  cd /
  171  ls
  172  cd dev
  173  ls
  174  w
  175  sudo -i
  176  cd
  177  pwd
  178  touch hello
  179  ls
  180  cd ..
  181  pwd
  182  echo hello > lhk
  183  cd /tmp
  184  ls
  185  sudo -i
  186  su -
  187  exit
  188  env
  189  bash
  190  su - linda
  191  su linda
  192  man proc
  193  cd /var
  194  sudo tail log/messages
  195  cd log
  196  sudo tail log/messages
  197  pwd
  198  sudo tail log /var/log/messages
  199  history
  200  cd ..
  201  ls
  202  cd games
  203  ls
  204  sudo tail ../log/messages
  205  cd /usr/local/src
  206  sudo tail ../../../var/log/messages
  207  sudo tail /var/log/messages
  208  history
  209  cd /etc
  210  less profile
  211  ls /etc/profile.d/
  212  less bashrc
  213  cd
  214  ls -a
  215  cat .bashrc
  216  cat .bash_profile
  217  cp /etc/hosts .
  218  ls
  219  cp /etc/hosts /tmp/sander
  220  ls -l /tmp/sander
  221  rm /tmp/sander
  222  cp /etc/hosts /tmp/sander/
  223  mkdir /tmp/sander/
  224  cp /etc/hosts /tmp/sander/
  225  ls -l /tmp/sander/
  226  cp -a ~/.* /tmp/sander/
  227  ls -a /tmp/sander/
  228  cp --help | less
  229  cp -R /etc /tmp/sander/
  230  ls /tmp/sander/
  231  ls /tmp/sander/etc
  232  history
  233  ls
  234  mv hello /tmp/sander/bye
  235  echo sh > goedemiddag
  236  mv goedemiddag /tmp/sander/bonjour
  237  ls /tmp/sander/goedemiddag /tmp/sander/bonjour
  238  cd /etc/profile.d/
  239  ls
  240  cd /
  241  ls -l
  242  countdown 12
  243  cd
  244  sudo updatedb
  245  ln /etc/hosts myhosts
  246  sudo ln /etc/hosts myhosts
  247  ls -il /etc/hosts myhosts
  248  sudo echo hello >> myhosts
  249  sudo -c echo hello >> myhosts
  250  sudo 'echo hello >> myhosts'
  251  sudo --help
  252  sudo -i
  253  which vi
  254  which vim
  255  ls -l $(which vi) $(which vim)
  256  ls -l /bin/vi $(which vim)
  257  ls -l /usr/bin/vi $(which vim)
  258  find / -name "hosts"
  259  find / -name "hosts" 2>/dev/null
  260  find / -name "*hosts*" 2>/dev/null
  261  find / -user linda
  262  find / -user linda 2>/dev/null
  263  sudo find / -size +1G 2>/dev/null
  264  sudo -i
  265  find / -name "hosts"
  266  find / -name "hosts" 2> errors.txt
  267  find / -name "hosts" > outputtxt
  268  cat outputtxt
  269  echo hello > hellofile
  270  man find
  271  sudo -i
  272  countdown 12
  273  vim myfile
  274  grep 'anna' my
  275  grep 'anna' myfile
  276  grep '^anna' myfile
  277  grep 'anna$' myfile
  278  grep '^anna$' myfile
  279  echo lea >> myfile
  280  echo lea nna >> myfile
  281  grep '^lea\b' myfile
  282  grep 'b*t' myfile
  283  grep 'bi*t' myfile
  284  grep 'bi+t' myfile
  285  grep -E 'bi+t' myfile
  286  grep -E 'bi?t' myfile
  287  grep -E 'bi\{4\}t' myfile
  288  grep 'bi\{4\}t' myfile
  289  grep 'b.t' myfile
  290  man semanage-fcontext
  291  tail -1 /etc/passwd
  292  tail -1 /etc/passwd | cut -f 1
  293  tail -1 /etc/passwd | cut -f 1 -d :
  294  cut -f 1 -d : /etc/passwd
  295  cut -f 1 -d : /etc/passwd | sort
  296  vim numbers
  297  sort numbers
  298  sort -n numbers
  299  vim numbers
  300  uniq numbers
  301  uniq --help
  302  uniq -u numbers
  303  uniq -d numbers
  304  cat numbers | uniq -d
  305  cat numbers | uniq -c
  306  sed -n 5p /etc/passwd
  307  sed -i s/lea/bea/g myfile
  308  cat myfile
  309  sed -i -e '2d' myfile
  310  echo hello > a.conf
  311  echo hello > ab.conf
  312  echo hello > abc.conf
  313  for i in *conf; do sed -i 's/hello/bye/g' $i; done
  314  cat *conf
  315  awk -F : '{ print $4 }' /etc/passwd
  316  awk -F : '/linda/ { print $4 }' /etc/passwd
  317  awk -F : '$3 > 999 { print $1 }' /etc/password
  318  awk -F : '$3 > 999 { print $1 }' /etc/passwd
  319  pinfo sed
  320  exit
  321  sudo -i
  322  history
  323  sudo -i
  324  oc login -u mysecretuser -p iuwgehkugguiggwkehiwiugbuiwguibguigiuguiygu
  325  touch newfile
  326  uniq -d numbers
  327  sudo -i
  328  countdown 12
  329  echo $PATH
  330  echo $USER
  331  echo $SHELL
  332  export drink=BEER
  333  echo $drink
  334  bash
  335  sleep 3000
  336  sleep 3600
  337  jobs
  338  bg
  339  sleep 3700 &
  340  jobs
  341  fg 2
  342  sudo -
  343  sudo -i
  344  history