linfun jan22 day2

#### root commands
[root@localhost devices]# history
    1  usermod -aG wheel bob
    2  id bob
    3  exit
    4  echo password | passwd --stdin linda
    5  exit
    6  dd if=/dev/zero of=/dev/null &
    7  top
    8  killall dd
    9  ps fax
   10  ps aux | grep defunct
   11  top
   12  ps -ef | less
   13  ps aux --sort pmem | less
   14  ps aux | grep crond
   15  kill -9 1318
   16  lscpu
   17  cd /sys
   18  ls
   19  cd bus/
   20  ls
   21  cd cpu/
   22  ls
   23  cd devices/
   24  pwd
   25  ls
   26  ls cpu0/
   27  ls cpu0/online
   28  cat cpu0/online
   29  echo 0 > cpu1/online
   30  lscpu
   31  dd if=/dev/zero of=/dev/null &
   32  top
   33  killall dd
   34  htop
   35  systemctl status NetworkManager
   36  ip a
   37  ip route show
   38  ifconfig
   39  ip a
   40  ifconfig
   41  man ifconfig
   42  which ifconfig
   43  rpm -qf $(which ifconfig)
   44  rpm -ql net-tools
   45  rpm -ql net-tools | grep bin
   46  dnf remove net-tools
   47  journalctl
   48  lsblk
   49  umount /dev/sdb1
   50  mount /dev/sdb1 /mnt
   51  ls /mnt
   52  history

### user commands
    3  ls
    4  ls -a
    5  ls .ssh/
    6  cat .ssh/known_hosts
    7  ssh 192.168.29.199
    8  sudo useradd bob
    9  sudo passwd bob
   10  su - bob
   11  history
   12  w
   13  exit
   14  vi countdown
   15  countdown
   16  echo $PATH
   17  ./countdown
   18  ls -l countdown
   19  chmod +x countdown
   20  ./countdown 12
   21  history
   22  cat countdown
   23  vi countdown
   24  echo $(( 2 x 2 ))
   25  echo $(( 2 * 2 ))
   26  vi countdown
   27  which true
   28  vi countdown
   29  countdown
   30  echo $PATH
   31  which true
   32  pwd
   33  ls -l countdown
   34  ls
   35  chmod +x countdown
   36  ./countdown 12
   37  history
   38  echo $PATH
   39  cp countdown /usr/local/bin
   40  ls /usr/local/bin
   41  ls -ld /usr/local/bin
   42  whoami
   43  sudo cp countdown /usr/local/bin
   44  countdown 0
   45  which countdown
   46  history
   47  ls -l /etc/shadow
   48  cat /etc/shadow
   49  sudo cat /etc/shadow
   50  ls -l /etc/shadow
   51  id
   52  useradd linda
   53  sudo useradd linda
   54  tail /etc/passwd
   55  sudo passwd linda
   56  history
   57  su - linda
   58  sudo usermod -aG wheel linda
   59  id linda
   60  su - linda
   61  history | tail -10
   62  countdown 12
   63  ssh [email protected]
   64  history
   65  exit
   66  history
   67  ls -a
   68  ls
   69  LS
   70  uname --help
   71  uname -a
   72  uname --all
   73  uname -srv
   74  uname --srv
   75  df --help
   76  df -h
   77  df --help
   78  whoami
   79  whoami --help
   80  hostname
   81  hostname --help
   82  who am i
   83  whoami
   84  who --help
   85  who mom likes
   86  ssh [email protected]
   87  date
   88  date --help | less
   89  date %N
   90  date +%d-%m-%y
   91  date +%d-%m-%y:%h:%m:%N
   92  uname --help | less
   93  uname -op
   94  uname -p
   95  uname -po
   96  passwd --help | less
   97  sudo dnf install tldr
   98  ssh [email protected]
   99  sudo dnf repolist
  100  sudo dnf install epel-release
  101  sudo dnf repolist
  102  sudo dnf install tldr
  103  tldr lvcreate
  104  tldr semanage
  105  history
  106  touch helloworld
  107  ls -l
  108  touch /usr/bin/helloworld
  109  touch helloworld
  110  ls -l
  111  last
  112  sudo dnf provides */semanage
  113  countdown 12
  114  tldr ls
  115  man ls
  116  info '(coreutils) ls invocation'
  117  pinfo '(coreutils) ls invocation'
  118  man lvcreate
  119  man -k user
  120  mandb
  121  sudo mandb
  122  man -k user
  123  man -k user | wc
  124  man -k user
  125  man man
  126  man -k user | grep 8
  127  cd /etc
  128  ls
  129  sudo vi sudoers
  130  ls -lrt
  131  cd /var/log
  132  ls -lrt
  133  tail messages
  134  sudo tail messages
  135  cd /etc
  136  ls l
  137  ls l*
  138  ls -d l*
  139  ls -d l?.*
  140  ls [klm]* -d
  141  ls [k-m]* -d
  142  mkdir blah
  143  pwd
  144  cd
  145  pwd
  146  mkdir myfiles
  147  cd myfiles/
  148  ls
  149  pwd
  150  cd ..
  151  cd -
  152  cd ../..
  153  rmdir student/myfiles/
  154  cd
  155  mkdir myfiles
  156  cp /etc/[a-d]* myfiles/
  157  ls myfiles/
  158  rmdir myfiles
  159  rm -rf myfiles/
  160  sudo dnf search epel
  161  man fhs
  162  man hier
  163  cd /
  164  ls
  165  history
  166  sudo poweroff
  167  ls
  168  pwd
  169  ls -l /var/log/messages
  170  cd /var
  171  ls -l log/messages
  172  ls
  173  cd gopher/
  174  ls
  175  ls -l log/messages
  176  pwd
  177  ls
  178  ls -l ../log/messages
  179  mkdir blah
  180  sudo mkdir blah
  181  cd blah/
  182  ls -l ../log/messages
  183  ls -l ../../log/messages
  184  ls -l /var/log/messages
  185  touch afile.txt
  186  sudo touch afile.txt
  187  cp afile.txt ~/myfiles
  188  ls -l ~/myfiles
  189  rm ~/myfiles
  190  cp afile.txt ~/myfiles/
  191  mkdir ~/myfiles; cp afile.txt ~/myfiles/
  192  cd
  193  ls
  194  ls -a
  195  cp -a .* myfiles/
  196  ls -a myfiles/
  197  man cp
  198  echo a ; echo b
  199  touch /var/log/blah ; echo b
  200  touch /var/log/blah && echo b
  201  touch /var/log/blah || echo b
  202  echo a || echo b
  203  ls
  204  cd myfiles/
  205  cp -R /tmp/ .
  206  ls
  207  cd tmp/
  208  ls
  209  cd ..
  210  rm -rf *
  211  cp -R /tmp .
  212  ls
  213  cd tmp
  214  ls
  215  history
  216  cd
  217  ls
  218  mv helloworld hellomoon
  219  ls
  220  mv hellomoon /tmp/
  221  ls /tmp/
  222  ls /tmp
  223  mkdir /tmp/trash/files
  224  mkdir -p /tmp/trash/files
  225  cp -a . /tmp/trash/files/
  226  ls /tmp/trash/files
  227  tree /tmp/trash/files
  228  cp -a /tmp/ .
  229  ls
  230  ln /etc/hosts myhosts
  231* ls -l /etc/hosts
  232  sudo ln /etc/hosts myhosts
  233  ls -il /etc/hosts myhosts
  234  sudo vim myhosts
  235  ls -il /etc/hosts myhosts
  236  cat /etc/hosts
  237  sudo /etc/hosts
  238  sudo rm /etc/hosts
  239  cat myhosts
  240  ls -il /etc/hosts myhosts
  241  sudo ln myhosts /etc/hosts
  242  ln -s myhosts symhosts
  243  ls -il /etc/hosts myhosts symhosts
  244  echo hello >> myhosts
  245  rm myhosts
  246  ls -il /etc/hosts myhosts symhosts
  247  cat symhosts
  248  ln /etc/hosts symhosts
  249  ln /etc/hosts myhosts
  250  sudo ln /etc/hosts myhosts
  251  history
  252  ls -il /etc/hosts myhosts symhosts
  253  vim symhosts
  254  ls -l
  255  sudo touch rootfile
  256  ls -l rootfile
  257  cat rootfile
  258  echo hello >> rootfile
  259  rm rootfile
  260  ls -ld .
  261  ls -l /
  262  df -h
  263  sudo ls -l /boot
  264  sudo ln /boot/vmlinuz-4.18.0-348.el8.0.2.x86_64 kernel
  265  sudo ln -s /boot/vmlinuz-4.18.0-348.el8.0.2.x86_64 kernel
  266  ls -l
  267  sudo find / -name "hosts"
  268  sudo find / -name "*hosts*"
  269  find / -name "*hosts*"
  270  find / -name "*hosts*" 2>/dev/null
  271  sudo find / -name linda
  272  sudo find / -size +500M
  273  sudo find / -size +500M 2>/dev/null
  274  mkdir linda; sudo find / -user linda -exec cp {} linda/ \;
  275  mkdir linda; sudo find / -user linda -exec cp -r {} linda/ \;
  276  ls linda/
  277  history
  278  man find
  279  sudo tar -cvf myfiles.tar /etc/hosts /home
  280  ls -l
  281  tar -tvf myfiles.tar | less
  282  tar -xvf myfiles.tar
  283  ls
  284  ls etc
  285  ls home
  286  rm -rf etc home
  287  sudo tar -czvf myfiles.tar.gz /etc/hosts /home
  288  man tar
  289  ls
  290  sudo tar -czvf myfiles.tar.gz /etc/hosts /home --exclude=myfiles*
  291  ls
  292  rm myfiles.tar.gz
  293  sudo tar -czvf myfiles.tar.gz /etc/hosts /home --exclude=myfiles*
  294  rm myfiles*; sudo tar -czvf /tmp/myfiles.tar.gz /etc/hosts /home
  295  time sudo tar -cjvf /tmp/myfiles.tar.bz2 /etc/hosts /home
  296  time sudo tar -cJvf /tmp/myfiles.tar.xz /etc/hosts /home
  297  ls -l /tmp/myfiles.tar.*
  298  history
  299  nano whatever
  300  vimtutor
  301  vim whatever
  302  vim countdown
  303  sudo less /var/log/messages
  304  sudo more /var/log/messages
  305  head /etc/passwd
  306  head -5 /etc/passwd
  307  head -n 5 /etc/passwd
  308  tail -5 /etc/passwd
  309  tail -5 /etc/passwd | head -1
  310  sudo tail -f /var/log/messages
  311  cat countdown
  312  tac countdown
  313  cd /etc
  314  sudo grep linda *
  315  sudo grep linda * 2>/dev/null
  316  sudo grep -l linda * 2>/dev/null
  317  sudo grep -li linda * 2>/dev/null
  318  sudo grep -li LINDA * 2>/dev/null
  319  ps aux
  320  ps aux | wc
  321  ps aux | grep ssh
  322  ps aux | grep ssh | grep -v grep
  323  sudo grep wheel /etc/sudoers
  324  sudo grep -A 5 -B 5 wheel /etc/sudoers
  325  grep linda *
  326  grep linda * 2>/dev/null
  327  grep -R linda * 2>/dev/null
  328  grep -R root * 2>/dev/null
  329  sudo grep -C 5 wheel /etc/sudoers
  330  man 7 regex
  331  tldr regex
  332  cd
  333  vim users.txt
  334  grep 'l' users.txt
  335  grep '^l' users.txt
  336  grep '^anna' users.txt
  337  echo anna
  338  echo anna >> users.txt
  339  grep '^anna' users.txt
  340  grep 'anna$' users.txt
  341  grep '^anna\b' users.txt
  342  grep '^anna ' users.txt
  343  grep 'b.t' users.txt
  344  grep 'b.*t' users.txt
  345  grep 'bt' users.txt
  346  echo bt >> users.txt
  347  grep 'b.*t' users.txt
  348  grep 'b.+t' users.txt
  349  grep -E 'b.+t' users.txt
  350  grep -E 'b.?t' users.txt
  351  grep 'bo\{12\}t' users.txt
  352  grep 'bo\{9\}t' users.txt
  353  grep '^$' users.txt
  354  grep '^.$' users.txt
  355  echo x >> users.txt
  356  grep '^.$' users.txt
  357  man semanage-fcontext
  358  sed -n 5p /etc/passwd
  359  sed -i 's/anna/bananna/g' users.txt
  360  cat users.txt
  361  sed -i -e '2d' users.txt
  362  cat users.txt
  363  echo hello > myfile{1..100}.txt
  364  touch myfile{1..100}.txt
  365  ls
  366  for i in myfile*; do echo $i; done
  367  for i in myfile*; do echo hello > $i; done
  368  rm -rf myfile
  369  rm -rf myfiles
  370  ls
  371  for i in myfile*; do echo 'hello > $i'; done
  372  for i in myfile*; do echo hello > $i; done
  373  cat myfile1
  374  cat myfile1.txt
  375  cat myfile18.txt
  376  history
  377  for i in myfile*; do sed -i 's/hello/goedemiddag/g' $i; done
  378  cat myfile66.txt
  379  cat /etc/passwd
  380  awk -F : '{ print $4 }' /etc/passwd
  381  awk -F : '/student/ { print $4 }' /etc/passwd
  382  awk -F : '$3 > 999 { print $1 }' /etc/passwd
  383  history
  384  cut -d : -f 1 /etc/passwd
  385  cut -d : -f 1 /etc/passwd | sort
  386  cut -d : -f 3 /etc/passwd | sort
  387  cut -d : -f 3 /etc/passwd | sort -n
  388  cut -d : -f 1 /etc/passwd | sort -n | tr [a-z] [A-Z]
  389  cut -d : -f 1 /etc/passwd | sort -n | tr [:lower:] [:upper:]
  390  echo $SHELL
  391  chsh --help
  392  chsh -l
  393  #chsh /bin/bash
  394  sort < /etc/services
  395  sort /etc/services
  396  ls
  397  ls > outfile.txt
  398  cat outfile.txt
  399  who > outfile.txt
  400  cat outfile.txt
  401  who >> outfile.txt
  402  grep -R root /proc
  403  grep -R root /etc
  404  grep -R root /etc 2> /dev/null
  405  grep -R root /etc 2> errors.txt
  406  ls -l errors.txt
  407  less errors.txt
  408  grep -R root /etc &> all.txt
  409  ls -l *txt
  410  ls -l [ae]*txt
  411  ps aux | less
  412  ps aux | grep ssh
  413  sudo kill 1120
  414  ps aux | grep ssh
  415  ps aux | tee psfile | grep ssh
  416  cat psfile
  417  ps aux | grep ssh
  418  sudo systemctl status sshd
  419  sudo systemctl start sshd
  420  ps aux | grep ssh
  421  sudo -i
  422  sudo 'echo password | passwd --stdin linda'
  423  sudo bash -c 'echo password | passwd --stdin linda'
  424  history
  425  history -d 424
  426  history
  427  history -d 422
  428  sudo dnf install bash-completion
  429  sudo nmcli connection modify ens160 ipv4.address 10.0.0.10/24
  430  sudo nmtui
  431  ip a
  432  env
  433  echo $USER
  434  echo $SHELL
  435  echo $PATH
  436  alias
  437  alias help='echo what do you want'
  438  help
  439  unalias help
  440  help
  441  sleep 3600
  442  sudo vim /etc/profile
  443  sudo vim /etc/bashrc
  444  sudo ls /etc/profile.d/
  445  ls -a
  446  vim .bash_profile
  447  vim .bashrc
  448  history
  449  sleep 3600
  450  bg
  451  jobs
  452  sleep 1800 &
  453  jobs
  454  fg 2
  455  fg
  456  sudo dd if=/dev/zero of=/dev/null &
  457  jobs
  458  sudo -i
  459  history