linfun day2 dec20

    1  echo hello >> myhosts
    2  ls -il /etc/hosts myhosts
    3  pwd
    4  cd /home/student/
    5  echo hello >> myhosts
    6  ls -il /etc/hosts myhosts
    7  cd mydir/
    8  ls
    9  echo hello >> myhosts
   10  ls -il /etc/hosts myhosts
   11  ln /etc myetc
   12  ln -s /etc myetc
   13  ln -s myhosts symhosts
   14  ls -il /etc/hosts myhosts symhosts
   15  rm myhosts
   16  ls -il /etc/hosts myhosts symhosts
   17  cat symhosts
   18  ln /etc/hosts myhosts
   19  ls -il /etc/hosts myhosts symhosts
   20  cd /
   21  ls -l
   22  find / -name hosts
   23  find / -name "*hosts*"
   24  useradd -m linda
   25  find / -user "linda"
   26  find / -user "linda" 2>/dev/null
   27  find / -size +1G
   28  find / -user linda -exec ls -al {} \;
   29  mkdir /root/linda/ ; find / -user linda -exec cp {} /root/linda/ \;
   30  ls -al /root/linda
   31  cd
   32  tar cvf backup.tar /etc /home
   33  tar cvf backup.tar /etc /tmp
   34  ls -l backup.tar
   35  tar czvf backup.tgz /etc /tmp
   36  ls -l back*
   37  tar cjvf backup.tar.bz2 /etc /tmp
   38  ls -l back*
   39  mv backup.tar backup
   40  file backup
   41  tar tvf backup
   42  ls
   43  tar xvf backup.tgz
   44  ls
   45  tar xvf backup.tgz -C /tmp
   46  ls /tmp
   47  rm -rf /tmp/tmp /tmp/etc
   48  history | grep ssh
   49  ip a
   50  ssh 192.168.4.42
   51  man rsync
   52  rsync 192.168.4.42:/etc .
   53  ls
   54  rm -rf etc tmp
   55  rsync -r 192.168.4.42:/etc .
   56  ls
   57  ls etc
   58  cat etc/centos-release
   59  ssh 192.168.4.42
   60  rsync -r 192.168.4.42:/etc .
   61  ssh 192.168.4.42
   62  ssh-keygen
   63  ssh-copy-id 192.168.4.42
   64  ssh 192.168.4.42
   65  rsync -r 192.168.4.42:/etc .
   66  history
   67  nano myfile
   68  vi myfile
   69  apt install vim
   70  ssh 192.168.4.42
   71  tail /etc/passwd
   72  tail /etc/passwd -5
   73  tail -5 /etc/passwd
   74  tail -5 /etc/passwd | head -1
   75  vim
   76  vim myfile
   77  cat myfile
   78  tac myfile
   79  ps aux
   80  ps aux | grep ssh
   81  grep linda /etc/*
   82  grep linda /etc/* 2>/dev/null
   83  grep -i linda /etc/* 2>/dev/null
   84  ps aux | grep ssh
   85  ps aux | grep ssh | grep -v grep
   86  apt install apache2
   87  find / -name "httpd.conf"
   88  find / -name "apache.conf"
   89  grep root /etc/ssh/sshd_config
   90  grep -A 2 root /etc/ssh/sshd_config
   91  grep -B 2 root /etc/ssh/sshd_config
   92  grep -B 3 -A 3 root /etc/ssh/sshd_config
   93  grep root /etc/* 2>/dev/null
   94  grep -R root /etc/* 2>/dev/null
   95  vim users
   96  grep '^a' users
   97  grep 'anna$' users
   98  grep '^anna$' users
   99  vim users
  100  grep '^lea\b' users
  101  grep '^lea ' users
  102  grep 'bo*t' users
  103  grep 'bo+t' users
  104  grep -E 'bo+t' users
  105  egrep 'bo+t' users
  106  egrep 'bo?t' users
  107  egrep 'bo\{3\}t' users
  108  egrep 'bo\{2\}t' users
  109  grep 'bo\{2\}t' users
  110  egrep 'bo.t' users
  111  alias s='ssh 192.168.4.42'
  112  s
  113  ls -a
  114  vim .profile
  115  vim .bashrc
  116  ls -l $(which vi) $(which vim)
  117  s
  118  vim /etc/profile
  119  vim /etc/bashrc
  120  tail /etc/passwd
  121  tail /etc/passwd | cut -d : -f 1
  122  tail /etc/passwd | awk -F : '{ print $1 }'
  123  tail /etc/passwd | awk -F : '{ print $1 }' | sort
  124  tail /etc/passwd | awk -F : '{ print $1 }' | sort | tr [:lower:] [:upper:]
  125  tail /etc/passwd | awk -F : '{ print $1 }' | sort | tr a-z A-Z
  126  sed -n p5 /etc/passwd
  127  sed -n 5p /etc/passwd
  128  sed -i s/lea/bea/ users
  129  grep bea users
  130  vim users
  131  sed -i s/bea/lea/ users
  132  grep lea users
  133  sed -i s/bea/lea/g users
  134  s
  135  exit
  136  history
  137  cat .bash_history
  138  history
  139  history
  140  history -d 139
  141  history
  142  history | grep egrep
  143  ip addrr
  144  echo $PATH
  145  export PATH=$PATH:/usr/local/bin
  146  echo $PATH
  147  env
  148  echo $LANG
  149  export LANG=fr_FR.UTF-8
  150  ls --help
  151  sleep 3600
  152  sleep 3600 &
  153  sleep 5000
  154  bg
  155  jobs
  156  ps aux
  157  jobs
  158  fg
  159  ps aux
  160  kill 16817
  161  ps aux | grep ssh
  162  systemctl status sshd
  163  systemctl stop sshd
  164  systemctl status sshd
  165  systemctl start sshd
  166  dd if=/dev/zero of=/dev/null &
  167  top
  168  killall dd
  169  top
  170  top -u student
  171  ps aux | less
  172  ps -ef
  173  ps -ef | less
  174  top
  175  apt install powertop
  176  powertop
  177  s
  178  lscpu
  179  cd /sys/
  180  ls
  181  cd bus/
  182  ls
  183  cd cpu/
  184  ls
  185  cd devices/
  186  tree
  187  apt install tree
  188  tree
  189  ls cpu0 cpu1
  190  cat cpu1/online
  191  echo 0 > cpu1/online
  192  lscpu
  193  cd
  194  dd if=/dev/zero of=/dev/null &
  195  top
  196  killall dd
  197  s
  198  useradd -m linda
  199  id linda
  200  groupadd sales
  201  usermod -aG sales linda
  202  id linda
  203  mkdir -p /data/sales
  204  cd /data
  205  ls -l
  206  chgrp sales sales
  207  ls -l
  208  chmod 770 sales
  209  ls -l
  210  su - linda
  211  cd
  212  cd /home/linda
  213  touch afile
  214  su - linda
  215  ip a
  216  ip route show
  217  ifconfig
  218  s
  219  lsblk
  220  umount /media/student/D4E3-88A0
  221  mount /dev/sdb1 /mnt
  222  mount
  223  cd /mnt
  224  ls
  225  touch gggg
  226  mount
  227  cd
  228  cd /mnt
  229  umount /dev/sdb1
  230  cd
  231  umount /dev/sdb1
  232  history