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

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=0 12 S 4 6 l l = 1 1 . 2 L4 6 l l lsb_release -a l 2

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l l

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cd /usr/share/doc l /usr/share/doc pwd l cd l ls l l ls -a, ls -F, ls -l

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mkdir foo l cd foo touch bar l l cd .. l

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tree sudo apt install tree tree . l . l .

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rmdir foo l D l ' ' ' l D rm foo/bar l foo/bar rmdir foo l :

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mkdir hoge touch hoge/piyo rm -r hoge l hoge " l !" sudo rm -rf /

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, l less more lv l q l l b l ls -l /etc | less

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less /etc/passwd l #! l %30% /etc/shadow sudo less /etc/shadow l %'2,"1+ l '2," &-)/*.( less /etc/group l $ !

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nano l sudo apt install nano l S CV l E vim emacs l E l C ( + + E + , )+ )

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man ls l man nano

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id -a l D I l

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S l S O S l sudo less /etc/shadow 0 l sudo id -a 0

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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

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!# 3- )& "3- )& ./%'0 l ,5*" 1 2+ !# $.(4 -|rw-|r--|--- ",5* ",5" 1

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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

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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

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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

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sudo reboot l reboot ifdown ifup sudo ifdown eth0; sudo ifup eth0 ssh l !

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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

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$ cat > sleep_echo.sh #!/bin/sh sleep $1 echo hello $ chmod +x sleep_echo.sh

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C 0 l ./sleep_echo.sh 10 l C l / l fg/bg C Z l jobs 1 + ./sleep_echo.sh 10 & l +

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l 0 P true 0false P S l true l echo $? l false l echo $? l set -e l false $? "

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