linux改变所有者|所在组|权限的三个命令

1、chown 改变所有者

chown jboss:jbossgrp install.log  jboss为用户,jbossgrp 为所在组

2、chgrp jbossgrp install.log 改变所在组

3、chmod 777 install.log 改变权限

user/group/others三种身份各有自己的read/write/execute权限:『-rwxrwxrwx』

user= rwx = 4+2+1 = 7

group = rwx = 4+2+1 = 7

others= --- = 0+0+0 = 0

chmod --help:

Usage: chmod [OPTION]... MODE[,MODE]... FILE...
  or:  chmod [OPTION]... OCTAL-MODE FILE...
  or:  chmod [OPTION]... --reference=RFILE FILE...
Change the mode of each FILE to MODE.

  -c, --changes           like verbose but report only when a change is made
      --no-preserve-root  do not treat `/' specially (the default)
      --preserve-root     fail to operate recursively on `/'
  -f, --silent, --quiet   suppress most error messages
  -v, --verbose           output a diagnostic for every file processed
      --reference=RFILE   use RFILE's mode instead of MODE values
  -R, --recursive         change files and directories recursively
      --help     display this help and exit
      --version  output version information and exit

Each MODE is of the form `[ugoa]*([-+=]([rwxXst]*|[ugo]))+'.



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