CHMOD.1
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- CHMOD(1) Minix Programmer's Manual CHMOD(1)
- NAME
- chmod - change access mode for files
- SYNOPSIS
- chmod [-R] mode file ...
- OPTIONS
- -R Change hierarchies recursively
- EXAMPLES
- chmod 755 file # Owner: rwx Group: r-x Others: r-x
- chmod +x file1 file2
- # Make file1 and file2 executable
- chmod a-w file # Make file read only
- chmod u+s file # Turn on SETUID for file
- chmod -R o+w dir # Allow writing for all files in dir
- DESCRIPTION
- The given mode is applied to each file in the file list. If the -R flag
- is present, the files in a directory will be changed as well. The mode
- can be either absolute or symbolic. Absolute modes are given as an octal
- number that represents the new file mode. The mode bits are defined as
- follows:
- 4000 Set effective user id on execution to file's owner id
- 2000 Set effective group id on execution to file's group id
- 0400 file is readable by the owner of the file
- 0200 writeable by owner
- 0100 executable by owner
- 0070 same as above, for other users in the same group
- 0007 same as above, for all other users
- Symbolic modes modify the current file mode in a specified way. The form
- is:
- [who] op permissions { op permissions ...} {, [who] op ... }
- The possibilities for who are u, g, o, and a, standing for user, group,
- other and all, respectively. If who is omitted, a is assumed, but the
- current umask is used. The op can be +, -, or =; + turns on the given
- permissions, - turns them off; = sets the permissions exclusively for the
- given who. For example g=x sets the group permissions to --x.
- 1
-
- CHMOD(1) Minix Programmer's Manual CHMOD(1)
- The possible permissions are r, w, x; which stand for read, write, and
- execute; s turns on the set effective user/group id bits. s only makes
- sense with u and g; o+s is harmless.
- SEE ALSO
- ls(1), chmod(2).
- 2
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