linux option practice (1)

1) mkdir

## mkdir option ##

root@ubuntu:/home/nojeans# mkdir --help
Usage: mkdir [OPTION]... DIRECTORY...
Create the DIRECTORY(ies), if they do not already exist.

Mandatory arguments to long options are mandatory for short options too.
  -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask
  -p, --parents     no error if existing, make parent directories as needed
  -v, --verbose     print a message for each created directory
  -Z                   set SELinux security context of each created directory
                         to the default type
      --context[=CTX]  like -Z, or if CTX is specified then set the SELinux
                         or SMACK security context to CTX
      --help     display this help and exit
      --version  output version information and exit

mkdir -m → 디렉토리 생성하면서 권한 생성

## 권한 -> drwxr-xr-x ##

nojeans@ubuntu:~$ mkdir -m 755 test
nojeans@ubuntu:~$ ls -al
total 40
drwxr-xr-x 5 nojeans nojeans 4096 Mar 25 08:03 .
drwxr-xr-x 3 root    root    4096 Mar 21 05:01 ..
-rw------- 1 nojeans nojeans   30 Mar 21 05:41 .bash_history
-rw-r--r-- 1 nojeans nojeans  220 Feb 25  2020 .bash_logout
-rw-r--r-- 1 nojeans nojeans 3771 Feb 25  2020 .bashrc
drwx------ 2 nojeans nojeans 4096 Mar 21 05:01 .cache
-rw-r--r-- 1 nojeans nojeans  807 Feb 25  2020 .profile
drwx------ 2 nojeans nojeans 4096 Mar 21 05:01 .ssh
-rw-r--r-- 1 nojeans nojeans    0 Mar 21 05:01 .sudo_as_admin_successful
drwxr-xr-x 2 nojeans nojeans 4096 Mar 25 08:03 test
-rw------- 1 nojeans nojeans   52 Mar 25 07:51 .Xauthority

## 권한 -> drwxrwxrwx #

nojeans@ubuntu:~$ mkdir -m 777 test02
nojeans@ubuntu:~$ ls
test  test02
nojeans@ubuntu:~$ ls -al
total 44
drwxr-xr-x 6 nojeans nojeans 4096 Mar 25 08:03 .
drwxr-xr-x 3 root    root    4096 Mar 21 05:01 ..
-rw------- 1 nojeans nojeans   30 Mar 21 05:41 .bash_history
-rw-r--r-- 1 nojeans nojeans  220 Feb 25  2020 .bash_logout
-rw-r--r-- 1 nojeans nojeans 3771 Feb 25  2020 .bashrc
drwx------ 2 nojeans nojeans 4096 Mar 21 05:01 .cache
-rw-r--r-- 1 nojeans nojeans  807 Feb 25  2020 .profile
drwx------ 2 nojeans nojeans 4096 Mar 21 05:01 .ssh
-rw-r--r-- 1 nojeans nojeans    0 Mar 21 05:01 .sudo_as_admin_successful
drwxr-xr-x 2 nojeans nojeans 4096 Mar 25 08:03 test
drwxrwxrwx 2 nojeans nojeans 4096 Mar 25 08:03 test02
-rw------- 1 nojeans nojeans   52 Mar 25 07:51 .Xauthority

mkdir -p → 디렉토리 안에 원하는 만큼 디렉토리 생성 가능

nojeans@ubuntu:~$ mkdir -p dir1/dir2/dir3

## 권한 필요하면 "sudo" 이용 ##

nojeans@ubuntu:~$ rm -r dir1
rm: descend into write-protected directory 'dir1'? yes
rm: descend into write-protected directory 'dir1/dir2'? yes
rm: remove write-protected directory 'dir1/dir2/dir3'? yes
rm: cannot remove 'dir1/dir2/dir3': Permission denied
nojeans@ubuntu:~$
nojeans@ubuntu:~$
nojeans@ubuntu:~$ sudo rm -r dir1

mkdir -v → 디렉토리 생성 시 “알림”

nojeans@ubuntu:~$ mkdir -v check
mkdir: created directory 'check' ## 이런 방식으로 알림 ##

nojeans@ubuntu:~$ ls
check

mkdir -Z→ selinux 되는 환경에서만 가능 (Security-Enhanced)

## selinux 설치되지 않은 환경 ##

nojeans@ubuntu:~$ sestatus -v | head -1 # selinux version 확인하는 명령어

Command 'sestatus' not found, but can be installed with:

sudo apt install policycoreutils

[참고 자료] https://leevisual.tistory.com/66

1) mkdir

2) nano