Jan Kończak

1	mkdir foo mkdir foo/baz …
	mkdir -p foo/baz/bar foo/bar foobaz/bar
2	rmdir foo/baz/bar rmdir foo/baz
3	echo "foo" > file1 ln file1 file2 echo "bar" > file2 cat file1
4	cd ln -s /tmp TMP cd TMP pwd
5	# second column of "ls -l" results
	ln -s /tmp ~/TMP cd ~/TMP pwd
6	cd ln -s . loop cd loop cd loop pwd
7	ln -s /nonexistent/path brokenSymlink ls -l
8	cp /etc/os-release /etc/SUSE-brand .
10	cp -a someDir newDir
11	mv newDir someDir
12	mv someDir anotherDir
13	cp -al anotherDir yetAnotherDir echo "modified" > yetAnotherDir/file2 tree -D --timefmt=%H:%M:%S anotherDir yetAnotherDir # fileów anotherDir/file2 i yetAnotherDir/file2
14	cd /tmp touch example scp example student@lab-sec-1:example
	cd /tmp touch example scp example student@lab-sec-1:
15	scp /tmp/example student@lab-sec-1:/tmp
16	cd /tmp sftp student@lab-sec-1 sftp> cd /tmp sftp> put example
	sftp student@lab-sec-1 sftp> cd /tmp sftp> put /tmp/example
	sftp student@lab-sec-1 sftp> cd /tmp sftp> lcd /tmp sftp> put example
17	touch file_{a..z} rm file_? touch file_{a..z} rm -f file_? …
18	rm file_? rm -f file_?
19	mkdir someDir rm -r someDir
20	sleep 2
21	time sleep 2
22	time openssl dhparam -text 1536
23	timeout 5s openssl dhparam -text 2048
24	ps
25	ps -l
	ps -f
	ps -F
	ps u
26	ps -e
	ps ax
27	ps -T # a process with two threads is displayed as two lines with same pid (and different tids)
	ps -L
28	pstree
	ps -eH
29	pstree -p
	ps -eH
30	cat /proc/self/status # the status is shown for the cat process
32	top # 'P' / 'M' sort by CPU / memory, besides '<' and '>' select sort columns
33	# Running, Sleeping, D → stalled on I/O (disk access), t → paused while debugging, Zombie
34	htop # '<' and '>' opens a sort menu # or: mouse click on column name
35	htop # 'F5' and 't' toggle tree view # 'F3' and '/' search, once search term is set, 'F3' jumps to ext occurrence
36	sleep 1h pgrep sleep
	sleep 1h pidof sleep
	sleep 1h pgrep -f 'sleep 1h'
37	sleep 1337h sleep 42h pgrep -f '1337h'
38	pgrep 'gdm$'
	pidof gdm
39	sleep 1h pgrep sleep # or e.g., ps -e , pstree -p , htop … kill pid
40	sleep 1h pkill sleep
41	# select "run…" from the panel, input "mousepad" pkill -STOP mousepad # notice that mousepad froze pkill -CONT mousepad # mousepad is now responsive
42	named -g -c <(:) pkill -HUP named # named states that it reloaded all configuration and zone files
43	nice -n 10 sleep 1h ps -el # or htop
44	sleep 1h pgrep sleep renice 15 pid
45	taskset -pc 0 $$ openssl dhparam -text $((2**14)) # ×2 htop # limit results to openssl by 'F4' or '\' # 'F8' increases niceness
	taskset -pc 0 $$ openssl dhparam -text $((2**14)) foobazbar # ×2 htop # search for openssl with 'F3' or '/' pgrep -f foobazbar renice -n 1 pid renice -n 2 pid ...