2018-04-Ubuntu Linux基礎 / 2018-04 Ubuntu

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2. 
   
   
   
3. 
   =0 12 S 4 6 l l
   = 1 1 . 2 L4 6 l   l 
   
   lsb_release -a l 2
4.  
   
     l 
   
      l  
5. 
     
   cd /usr/share/doc l /usr/share/doc
   pwd l
   cd l
   ls l l ls -a, ls -F, ls -l
6. 
   
   mkdir foo l
   cd foo
   touch bar l l
   cd .. l
7. tree
   
   sudo apt install tree
   tree . l .     l . 
     
8.  
   
   rmdir foo l D l ' ' ' l D
   rm foo/bar l foo/bar
   rmdir foo l :
10.  
    
    mkdir hoge
    touch hoge/piyo
    rm -r hoge l hoge "  l !"  
        
    sudo rm -rf /
11. 
    
    , l less more lv
    l q l l b
    l ls -l /etc | less
12. 
    
    less /etc/passwd l #! l %30
    % /etc/shadow
    sudo less /etc/shadow l %'2,"1+ l '2,"  &-)/*. (
    less /etc/group l $ !
13. 
    
    nano l sudo apt install nano l S CV l E
    vim emacs l E l C ( + + E
    + , )+ )
14. 
    
    man ls l 
    
    man nano
15. 
    
    
    
    id -a
    l D
    I
    l
16. 
    S l
    S O
    S l sudo less /etc/shadow 0 l sudo id -a 0
17. 
    
    ls -l /etc/shadow l -rw-r----- 1 root shadow 978 Feb 6 14:30 /etc/shadow
    cd; cp /etc/shadow ./ l shadow l ' / / / l P :
    P -rw-r-----
    root
    shadow
    978
18. 
    
     !#
    3- )&
    "3- )& ./% '0 l ,5*" 1 2+ !# $.(4  -|rw-|r--|--- ",5* ",5" 1
19. 
    
    sudo cp /etc/shadow ./ l root   shadow  l cp  & # !')
    root & # !$ %"
    
    ls –l ./shadow l -rw-r----- 1 root root 978 Jun 29 17:46 ./shadow
    sudo chmod 664 ./shadow l  664  l  1=x, 2=w, 4=r *(
    6=2+4=rw
    ls –l ./shadow l -rw-rw-r-- 1 root root 978 Jun 29 17:46 ./shadow
20. 
    
    less ./shadow l   
     
    touch ./shadow l touch: cannot touch 'shadow': Permission denied l ! "
    sudo chown kota_uchida ./shadow l  # kota_uchida !
    ls –l ./shadow l -rw-rw-r-- 1 kota_uchida root 978 Jun 29 17:46 ./shadow
    touch ./shadow l  
21. 
    I 0
    -
    
22. 
    man 5 interfaces l D man man
    sudo nano /etc/network/interfaces auto eth0 iface eth0 inet static address I 12 5 netmask 255.255.240.0 gateway dns-nameservers
23. 
    sudo reboot l reboot  ifdown ifup  sudo ifdown eth0; sudo ifup eth0
    ssh   l   !
     
24. 
       
    
25. 
    
    OS d
    OS d
    ps ux l OS
    sudo ps auxwwe | less l OS l e
    kill PID l OS OS S l a OS l kill -9 -1
26.  
       $ cat > sleep_echo.sh #!/bin/sh sleep $1 echo hello 
     $ chmod +x sleep_echo.sh
27.   
      
    C
    0 l
    ./sleep_echo.sh 10 l C l / l fg/bg C Z l jobs 1 +
    ./sleep_echo.sh 10 & l +
28. 
    
    l 0 P
    true 0false P
    S l true l echo $? l false l echo $? l set -e l false $? "
30. 
    
    l a e l ( () d3
    man 3 daemon l sudo apt install manpages-dev l man 3 daemon
31. 
    0 - cn
    b : : Wa U 0 - h ld i
    m b je l / 6 -. 16 . - /.- 0 1 2 . # -. .2 6 . -. -. .2 6 . -. / 2 0 - 20 :
32. 
    
33. 
    
    
    l man bash l sudo apt install bash-doc; info bash
    ) ( l chsh l ) ,