linux fundamentals oct 2020

    1  usermod -aG wheel student
    2  exit
    3  id
    4  exit
    5  cd /boot
    6  ls -il
    7  cp /etc/hosts .
    8  ls -il
    9  debugfs /dev/sda1
   10  ls -l /etc/hosts
   11  cat /etc/hosts
   12  ls -li
   13  cp hosts cphosts
   14  ls -il hosts cphosts
   15  ln hosts hardhosts
   16  ls -il hosts hardhosts
   17  echo hello >> hosts
   18  ls -il hosts hardhosts
   19  ln -s hosts symhosts
   20  ls -il hosts hardhosts symhosts
   21  cat symhosts
   22  rm hosts
   23  ls -l symhosts
   24  cat symhosts
   25  ln hardhosts hosts
   26  cat symhosts
   27  cd /
   28  ls -l
   29  history
   30  ln /boot/hosts /tmp/hosts
   31  ln /etc/ /tmp/etc
   32  ln -s /etc/ /tmp/etc
   33  cd /tmp
   34  ls
   35  exit
   36  cd /boot
   37  ls -l
   38  chmod +x hosts
   39  ls -l
   40  find / -name "hosts"
   41  find / -name "hosts" 2>/dev/null
   42  find / -name "*hosts*" 2>/dev/null
   43  find / -user linda
   44  find / -size +200M 2>/dev/null
   45  mkdir /root/linda; find / -user linda -exec cp {} /root/linda/ \;
   46  history
   47  cd
   48  ls kugkjgjg ; who
   49  ls kugkjgjg && who
   50  ls kugkjgjg || who
   51  ls /etc/hosts || who
   52  find / -size +100M -exec ls -l {} \; -exec cp {} /root/linda/ \;
   53  tar -cvf my_archive.tar /home /etc
   54  ls -l
   55  tar -tvf my_archive.tar
   56  tar -xvf my_archive.tar
   57  ls
   58  yum install -y tree
   59  tree etc
   60  rm -rf etc home
   61  ls
   62  tar -czvf my_archive.tar /home /etc
   63  ls -l
   64  tar -cjvf my_archive.tar.bz2 /home /etc
   65  ls -l
   66  rm -rf /home
   67  tar xvf my_archive.tar home -C /
   68  tree /home
   69  tar xvf my_archive.tar -C / home
   70  tree /home
   71  history
   72  ls -l
   73  file my_archive.tar
   74  gunzip my_archive.tar
   75  rm my_archive.tar
   76  tar cvf etc.tar /etc
   77  ls -l
   78  gzip etc.tar
   79  ls -l
   80  gunzip etc.tar.gz
   81  ls -l
   82  bzip2 etc.tar
   83  ls -l
   84  bunzip2 etc.tar.bz2
   85  xz etc.tar
   86  ls -l
   87  file my_archive.tar.bz2
   88  find / -name countdown
   89  echo $PATH
   90  ln /usr/local/bin/countdown /usr/local/sbin/countdown
   91  countdown 12
   92  vim myfile
   93  vimtutor
   94  less /var/log/messages
   95  more /var/log/messages
   96  head /etc/passwd
   97  head -5 /etc/passwd
   98  head -5 /etc/passwd | tail -1
   99  tail -f /var/log/messages
  100  cat myfile
  101  tac myfile
  102  visudo
  103  export EDITOR=/usr/bin/nano
  104  visudo
  105  echo export EDITOR=/usr/bin/nano >> .bashrc
  106  vim .bashrc
  107  export EDITOR=
  108  visudo
  109  cd /etc
  110  grep linda *
  111  grep linda * 2>/dev/null
  112  ps aux
  113  ps aux | grep ssh
  114  ps aux | grep ssh | grep -v grep
  115  grep LINDA *
  116  grep LINDA * 2>/dev/null
  117  grep -i LINDA * 2>/dev/null
  118  grep -iR LINDA * 2>/dev/null
  119  grep -iR root * 2>/dev/null
  120  grep -iR -A 2 -B 2 linda * 2>/dev/null
  121  COLOR=red
  122  echo $COLOR
  123  unset COLOR
  124  echo $COLOR
  125  cd
  126  vim myfile
  127  grep lea myfile
  128  grep 'lea' myfile
  129  grep '^lea' myfile
  130  vim myfile
  131  grep '^lea\b' myfile
  132  grep '^lea' myfile
  133  grep '^lea ' myfile
  134  cat myfile
  135  grep 'bo*t' myfile
  136  grep 'bo+t' myfile
  137  grep -E 'bo+t' myfile
  138  grep -E 'bo?t' myfile
  139  grep 'bon\{3\}nen' myfile
  140  grep 'bon\{3\}en' myfile
  141  grep '^.$' myfile
  142  grep '^..$' myfile
  143  grep 'bon{3}en' myfile
  144  man semanage-fcontext
  145  man 7 regex
  146  man man
  147  man 7 signals
  148  man 7 signal
  149  man 7 intro
  150  man 7 standards
  151  man man
  152  man 2 intro
  153  cat /etc/passwd
  154  cut -d : -f 3 /etc/passwd
  155  cut -d : -f 3 /etc/passwd | sort
  156  cut -d : -f 3 /etc/passwd | sort -k
  157  cut -d : -f 3 /etc/passwd | sort -n
  158  echo hello | tr a-z A-Z
  159  echo hello | tr [:lower:] [:upper:]
  160  echo hello | tr [[:lower:]] [[:upper:]]
  161  countdown 12
  162  sed -n 5p /etc/passwd
  163  vim myfile
  164  sed -i s/bonnen/bennen/g myfile
  165  cat myfile
  166  ip a
  167  for i in [1..99]; do echo $i; done
  168  for i in {1..99}; do echo $i; done
  169  for i in {1..99}; do echo hello > $i.conf; done
  170  ls
  171  cat 44.conf
  172  for i in *conf; do sed -i 's/hello/goedemiddag/g' $i; done
  173  cat 66.conf
  174  awk -F : '{ print $4 }' /etc/passwd
  175  awk -F : '/linda/ { print $3 }' /etc/passwd
  176  awk -F : '$3 > 999 { print $1 }' /etc/passwd
  177  pinfo sed
  178  ls
  179  ls > ls.out
  180  less ls.out
  181  who > ls.out
  182  cat ls.out
  183  date >> ls.out
  184  cat ls.out
  185  less /etc/services
  186  sort /etc/services
  187  yum install -y mailx
  188  mail -s hello root
  189  mail -s hello root < .
  190  grep -R root /proc
  191  grep -R root /proc 2> errors.txt
  192  ps aux | tee psfile | grep ssh
  193  less psfile
  194  history
  195  ls -a
  196  date >> ls.out
  197  ls
  198  cd /etc
  199  grep linda *
  200  grep linda * > ~/outfile.txt
  201  grep linda * > ~/outfile.txt 2&>1
  202  less ~/outfile.txt
  203  cd
  204  history
  205  cd /boot
  206  ls -l
  207  chmod +x hosts
  208  ls -l
  209  find / -name "hosts"
  210  find / -name "hosts" 2>/dev/null
  211  find / -name "*hosts*" 2>/dev/null
  212  find / -user linda
  213  find / -size +200M 2>/dev/null
  214  mkdir /root/linda; find / -user linda -exec cp {} /root/linda/ \;
  215  history
  216  cd
  217  ls kugkjgjg ; who
  218  ls kugkjgjg && who
  219  ls kugkjgjg || who
  220  ls /etc/hosts || who
  221  find / -size +100M -exec ls -l {} \; -exec cp {} /root/linda/ \;
  222  tar -cvf my_archive.tar /home /etc
  223  ls -l
  224  tar -tvf my_archive.tar
  225  tar -xvf my_archive.tar
  226  ls
  227  yum install -y tree
  228  tree etc
  229  rm -rf etc home
  230  ls
  231  tar -czvf my_archive.tar /home /etc
  232  ls -l
  233  tar -cjvf my_archive.tar.bz2 /home /etc
  234  ls -l
  235  rm -rf /home
  236  tar xvf my_archive.tar home -C /
  237  tree /home
  238  tar xvf my_archive.tar -C / home
  239  tree /home
  240  history
  241  ls -l
  242  file my_archive.tar
  243  gunzip my_archive.tar
  244  rm my_archive.tar
  245  tar cvf etc.tar /etc
  246  ls -l
  247  gzip etc.tar
  248  ls -l
  249  gunzip etc.tar.gz
  250  ls -l
  251  bzip2 etc.tar
  252  ls -l
  253  bunzip2 etc.tar.bz2
  254  xz etc.tar
  255  ls -l
  256  file my_archive.tar.bz2
  257  find / -name countdown
  258  echo $PATH
  259  ln /usr/local/bin/countdown /usr/local/sbin/countdown
  260  countdown 12
  261  vim myfile
  262  vimtutor
  263  less /var/log/messages
  264  more /var/log/messages
  265  head /etc/passwd
  266  head -5 /etc/passwd
  267  head -5 /etc/passwd | tail -1
  268  tail -f /var/log/messages
  269  cat myfile
  270  tac myfile
  271  visudo
  272  export EDITOR=/usr/bin/nano
  273  visudo
  274  echo export EDITOR=/usr/bin/nano >> .bashrc
  275  vim .bashrc
  276  export EDITOR=
  277  visudo
  278  cd /etc
  279  grep linda *
  280  grep linda * 2>/dev/null
  281  ps aux
  282  ps aux | grep ssh
  283  ps aux | grep ssh | grep -v grep
  284  grep LINDA *
  285  grep LINDA * 2>/dev/null
  286  grep -i LINDA * 2>/dev/null
  287  grep -iR LINDA * 2>/dev/null
  288  grep -iR root * 2>/dev/null
  289  grep -iR -A 2 -B 2 linda * 2>/dev/null
  290  COLOR=red
  291  echo $COLOR
  292  unset COLOR
  293  echo $COLOR
  294  cd
  295  vim myfile
  296  grep lea myfile
  297  grep 'lea' myfile
  298  grep '^lea' myfile
  299  vim myfile
  300  grep '^lea\b' myfile
  301  grep '^lea' myfile
  302  grep '^lea ' myfile
  303  cat myfile
  304  grep 'bo*t' myfile
  305  grep 'bo+t' myfile
  306  grep -E 'bo+t' myfile
  307  grep -E 'bo?t' myfile
  308  grep 'bon\{3\}nen' myfile
  309  grep 'bon\{3\}en' myfile
  310  grep '^.$' myfile
  311  grep '^..$' myfile
  312  grep 'bon{3}en' myfile
  313  man semanage-fcontext
  314  man 7 regex
  315  man man
  316  man 7 signals
  317  man 7 signal
  318  man 7 intro
  319  man 7 standards
  320  man man
  321  man 2 intro
  322  cat /etc/passwd
  323  cut -d : -f 3 /etc/passwd
  324  cut -d : -f 3 /etc/passwd | sort
  325  cut -d : -f 3 /etc/passwd | sort -k
  326  cut -d : -f 3 /etc/passwd | sort -n
  327  echo hello | tr a-z A-Z
  328  echo hello | tr [:lower:] [:upper:]
  329  echo hello | tr [[:lower:]] [[:upper:]]
  330  countdown 12
  331  sed -n 5p /etc/passwd
  332  vim myfile
  333  sed -i s/bonnen/bennen/g myfile
  334  cat myfile
  335  ip a
  336  for i in [1..99]; do echo $i; done
  337  for i in {1..99}; do echo $i; done
  338  for i in {1..99}; do echo hello > $i.conf; done
  339  ls
  340  cat 44.conf
  341  for i in *conf; do sed -i 's/hello/goedemiddag/g' $i; done
  342  cat 66.conf
  343  awk -F : '{ print $4 }' /etc/passwd
  344  awk -F : '/linda/ { print $3 }' /etc/passwd
  345  awk -F : '$3 > 999 { print $1 }' /etc/passwd
  346  pinfo sed
  347  ls
  348  ls > ls.out
  349  less ls.out
  350  who > ls.out
  351  cat ls.out
  352  date >> ls.out
  353  cat ls.out
  354  less /etc/services
  355  sort /etc/services
  356  yum install -y mailx
  357  mail -s hello root
  358  mail -s hello root < .
  359  grep -R root /proc
  360  grep -R root /proc 2> errors.txt
  361  ps aux | tee psfile | grep ssh
  362  less psfile
  363  history
  364  ls -a
  365  date >> ls.out
  366  ls
  367  cd /etc
  368  grep linda *
  369  grep linda * > ~/outfile.txt
  370  grep linda * > ~/outfile.txt 2&>1
  371  less ~/outfile.txt
  372  cd
  373  history
  374  history -w
  375  vim .bash_history
  376  exit
  377  history
  378  history -w
  379  cp .bash_history .bash_history.bak
  380  history -d 365
  381  history -w
  382  history
  383  cat .bash_history
  384  exit
  385  echo $COLOR
  386  exit
  387  echo $COLOR
  388  exit
  389  history
  390  touch iwyrighiwhybiuheiurbhiuerhiubhiuerhbiuheriubiuebriubgeiugbui
  391  ls
  392  rm iwyrighiwhybiuheiurbhiuerhiubhiuerhbiuheriubiuebriubgeiugbui
  393  yum install -y bash-completion
  394  echo $EDITOR
  395  echo $PATH
  396  env
  397  COLOR=red
  398  echo $COLOR
  399  bash
  400  export COLOR=red
  401  bash
  402  vim ~/.bashrc
  403  exit
  404  echo $PATH
  405  echo $EDITOR
  406  set
  407  env
  408  alias hello='ls -l /etc/'
  409  hello
  410  alias
  411  sleep 3600
  412  vim /etc/profile
  413  cd /etc/profile.d/
  414  ls
  415  vim colorls.sh
  416  cd
  417  vim .bash_profile
  418  vim .bashrc
  419  vim .bash_logout
  420  countdown 12
  421  sleep 3600
  422  bg
  423  jobs
  424  sleep 1800 &
  425  jobs
  426  fg 2
  427  fg
  428  ps aux | grep ssh
  429  systemctl status sshd
  430  top
  431  dd if=/dev/zero of=/dev/null &
  432  top
  433  ps
  434  ps aux
  435  ps -ef
  436  ps -ef | less
  437  ps -e -o pid,args --forest
  438  kill -9 2394
  439  ps -e -o pid,args --forest
  440  ps aux --sort pmem | less
  441  ps aux --sort pmem | head
  442  dd if=/dev/zero of=/dev/null &
  443  top
  444  ps aux | grep dd
  445  killall dd
  446  ps aux
  447  yum repolist
  448  yum install epel-release
  449  yum repolist
  450  yum search nmap
  451  yum install nmap
  452  yum search rwho
  453  yum search seinfo
  454  yum provides */seinfo
  455  yum install setools-console -y
  456  yum install -y git
  457  git clone git://git.sv.gnu.org/coreutils
  458  ls
  459  cd coreutils/
  460  ls
  461  cd src
  462  ls
  463  less cut.c
  464  cd
  465  which yum
  466  ls -l /usr/bin/yum
  467  su - linda
  468  usermod -aG wheel linda
  469  id linda
  470  mkdir /data/sales
  471  mkdir -p /data/sales
  472  groupadd sales
  473  usermod -aG sales linda
  474  id linda
  475  cd /data
  476  ls
  477  ls -l
  478  chown linda.sales sales
  479  ls -l
  480  chmod 770 sales
  481  su - linda
  482  ip a
  483  nmtui
  484  man ifconfig
  485  lsblk
  486  umount /dev/sdb1
  487  lsblk
  488  mount /dev/sdb1 /mnt
  489  cd /mnt
  490  ls
  491  cd
  492  umount /dev/sdb1
  493  yum install -y httpd
  494  systemctl status httpd
  495  systemctl start httpd
  496  systemctl status httpd
  497  systemctl enable httpd
  498  cd /var/log
  499  ls -l
  500  less messages
  501  journalctl
  502  journalctl -u sshd
  503  journalctl --dmesg
  504  journalctl -u crond --since yesterday
  505  man ifconfig
  506  ip -s link
  507  history