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2018-04-Ubuntu Linux基礎 / 2018-04 Ubuntu
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Cybozu
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July 02, 2018
Programming
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2018-04-Ubuntu Linux基礎 / 2018-04 Ubuntu
Cybozu
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July 02, 2018
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Transcript
1 0 2
=0 12 S 4 6 l l =
1 1 . 2 L4 6 l l lsb_release -a l 2
l
l
cd /usr/share/doc l /usr/share/doc pwd l cd
l ls l l ls -a, ls -F, ls -l
mkdir foo l cd foo touch bar l
l cd .. l
tree sudo apt install tree tree . l .
l .
rmdir foo l D l ' ' '
l D rm foo/bar l foo/bar rmdir foo l :
None
mkdir hoge touch hoge/piyo rm -r hoge
l hoge " l !" sudo rm -rf /
, l less more lv l q
l l b l ls -l /etc | less
less /etc/passwd l #! l %30 % /etc/shadow sudo
less /etc/shadow l %'2,"1+ l '2," &-)/*. ( less /etc/group l $ !
nano l sudo apt install nano l S CV
l E vim emacs l E l C ( + + E + , )+ )
man ls l man nano
id -a l D I l
S l S O S l sudo less
/etc/shadow 0 l sudo id -a 0
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
!# 3- )& "3- )& ./%
'0 l ,5*" 1 2+ !# $.(4 -|rw-|r--|--- ",5* ",5" 1
sudo cp /etc/shadow ./ l root
shadow l cp & # !')root & # !$ %" 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
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
I 0 -
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
sudo reboot l reboot ifdown ifup sudo ifdown
eth0; sudo ifup eth0 ssh l !
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
$ cat > sleep_echo.sh
#!/bin/sh sleep $1 echo hello $ chmod +x sleep_echo.sh
C 0
l ./sleep_echo.sh 10 l C l / l fg/bg C Z l jobs 1 + ./sleep_echo.sh 10 & l +
l 0 P true 0false P
S l true l echo $? l false l echo $? l set -e l false $? "
None
l a e l ( () d3
man 3 daemon l sudo apt install manpages-dev l man 3 daemon
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 :
l man bash l sudo apt install
bash-doc; info bash ) ( l chsh l ) ,