[Linux] && , || , ;

 1. && : 앞의 명령이 성공해야만 뒤의 명령을 수행

ex) aaaa && top

result) -bash: net: command not found

 2. || : 앞의 명령이 실패하면 뒤의 명령을 수행

ex) aaaa || top

result)  Processes: 260 total, 2 running, 8 stuck, 250 sleeping, 1353 threads ....

 3. ; : 성공 실패와 상관없이 수행

ex) a ; b ; c

-bash: a: command not found

-bash: b: command not found

-bash: c: command not found

 4. >> : 해당명령을 append

ex) 

$ ls >> t.txt

result)

events-snb/
nginx.plist~
nohup.out
setting/
snb/
t.txt
test/
testLog/
total 184
drxxr-xr-x+  50 root  staff   1700 10 16 13:58 ./
drxxr-xr-x    6 root  staff    204  9 12 02:11 ../
-r--------    1 root  staff      8  9 11 18:27 .CFUserTextEncoding
drxxr-xr-x+   3 root  staff    102  9 12 05:38 .CrossWeb/

 5. > : 해당 명령을 overwrite

ex)

$ ls > t.txt

result)

$ cat.txt

events-snb/
nginx.plist~
nohup.out
setting/
snb/
t.txt
test/
testLog/