1	pwd
2	cd /var/log
3	ls
4	cd ../../
5	ls -l
6	ls -lhS, ls -lhSr
7	echo $LANG
8	export LANG=ja_JP.UTF-8
9	cd
10	ls -a
11	mkdir work
12	mkdir -p work/dir1/dir2
13	touch work/memo{1..3}.txt
14	echo "YOUR-NAME" >> work/memo1.txt
15	date >> work/memo1.txt
16	ls >> work/memo2.txt
17	cat work/memo1.txt work/memo2.txt >> work/memo3.txt
18	cp work/memo3.txt work/memo4.txt
19	cp -a work/memo3.txt work/memo4.txt 
20	diff -q work/memo3.txt work/memo4.txt
21	echo "YOUR-NAME" >> work/memo4.txt, diff -q work/memo3.txt work/memo4.txt
22	rm work/memo3.txt
23	mv work/memo4.txt work/memo3.txt
24	cp -r work work2
25	rm -r work
26	mv work2 work
27	less /etc/sysctl.conf
28	less -N /etc/sysctl.conf
29	env
30	env | less
31	env | grep LANG | less
32	env | head -n 5
33	env | tail -n 5
34	su
35	adduser ameku
36	passwd ameku
37	exit
38	chmod 700 work
39	sudo su ameku, ls work
40	exit, su, usedel -r ameku
41	ps
42	tail -f /var/log/messages&
43	kill -9 processid(ps コマンドで調べる)