ubuntu File/Directory Permissions
액세스 제한 의 세 가지 유형이 있습니다
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Permission Action chmod option read (view) r or 4 write (edit) w or 2 execute (execute) x or 1 |
사용자 제한 의 세 가지 유형 이있다
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User ls output owner -rwx------ group ----rwx--- other -------rwx |
Folder/Directory Permissions
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Permission Action chmod option read (view contents, i.e. ls command) r or 4 write (create or remove files from dir) w or 2 execute (cd into directory) x or 1 |
Permissions in Action
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user@host:/home/user$ ls -l /etc/hosts -rw-r--r-- 1 root root 288 2005-11-13 19:24 /etc/hosts user@host:/home/user$ |
-rw-r–r–
owner = Read & Write (rw-)
group = Read (r–)
other = Read (r–)
Changing Permissions
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user@host:/home/user# ls -l /etc/shadow -rw-r----- 1 root shadow 869 2005-11-08 13:16 /etc/shadow Permissions: owner = Read & Write (rw-) group = Read (r--) other = None (---) Ownership: owner = root group = shadow |
Usage: chmod {options} filename
Options Definition
u owner
g group
o other
a all (same as ugo)
x execute
w write
r read
+ add permission
– remove permission
= set permission
Owner Group Other
read & write read & write read, write & execute
4+2=6 4+2=6 4+2+1=7
처음 화일 생성
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user@host:/home/user$ touch file1 file2 file3 file4 user@host:/home/user$ ls -l total 0 -rw-r--r-- 1 user user 0 Nov 19 20:13 file1 -rw-r--r-- 1 user user 0 Nov 19 20:13 file2 -rw-r--r-- 1 user user 0 Nov 19 20:13 file3 -rw-r--r-- 1 user user 0 Nov 19 20:13 file4 |
owner 실행권한설정
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user@host:/home/user$ chmod 744 file1 user@host:/home/user$ ls -l file1 -rwxr--r-- 1 user user 0 Nov 19 20:13 file1 |
Other 쓰기 & 실행권한설정
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user@host:/home/user$ chmod 647 file2 user@host:/home/user$ ls -l file2 -rw-r--rwx 1 user user 0 Nov 19 20:13 file2 |
everyone 읽시 & 쓰기 & 실행권한설정
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user@host:/home/user$ chmod 777 file4 user@host:/home/user$ ls -l file4 -rwxrwxrwx 1 user user 0 Nov 19 20:13 file4 |
특정 디렉토리 및 하위 디렉토리 모든권한설정
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user@host:/home/user$ sudo chmod 777 -R /path/to/someDirectory user@host:/home/user$ ls -l total 3 -rwxrwxrwx 1 user user 0 Nov 19 20:13 file1 drwxrwxrwx 2 user user 4096 Nov 19 20:13 folder -rwxrwxrwx 1 user user 0 Nov 19 20:13 file2 |
특정 디렉토리 및 하위 디렉토리 owner / group 변경
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user@host:/home/user$ ls -l total 3 -rwxrwxrwx 1 user user 0 Nov 19 20:13 file1 drwxrwxrwx 2 user user 4096 Nov 19 20:13 folder -rwxrwxrwx 1 user user 0 Nov 19 20:13 file2 user@host:/home/user$ sudo chown -R www-data:www-data /path/to/someDirectory user@host:/home/user$ ls -l total 3 -rwxrwxrwx 1 www-data www-data 0 Nov 19 20:13 file1 drwxrwxrwx 2 www-data www-data 4096 Nov 19 20:13 folder -rwxrwxrwx 1 www-data www-data 0 Nov 19 20:13 file2 |