Chmod

Uit De Vliegende Brigade
Ga naar: navigatie, zoeken

Voorbeeld: chmod & webserver

sudo chmod -R 777 /var/www/site

Ik geloof dat 777 overkill is, maar niet op m'n privé-ontwikkelserver.

Rechten hosting-acount Drupal-site goed krijgen

  1. Niets mag
  2. Lees- en executierechten op alle bestanden (executierechten want php-bestanden), maar geen schrijfrechten (bestanden mogen niet aangepast worden)
  3. Lees- en executierechten op alle mappen (zonder executierechten kunnen bestanden niet benaderd worden), maar geen schrijfrechten (er mogen geen bestanden aangemaakt of verwijderd worden)
  4. sites/default/files: Bestanden: Recursieve lees- & schrijfrechten, maar geen executierechten.
  5. sites/default/files: Mappen: Lees-, schrijf- en executierechten
  6. Map tmp: Lees-, schrijf- en executierechten
  7. Bestanden in map tmp: Lees- en schrijfrechten. Geen executrierechten (denk ik).

Resultaat - dit is work in progress:

sudo chmod -R 705 ~/public/example.com/public
sudo chmod -R 706 ~/public/example.com/public/sites/default/files

sudo chmod 707 ~/public/example.com/public/sites/default/files
find ~/public/example.com/public/sites/default/files -type d -exec chmod 0707 {} \;

sudo chmod 707 ~/public/example.com/public/tmp

man chmod

CHMOD(1)                                        User Commands                                       CHMOD(1)



NAME
       chmod - change file mode bits

SYNOPSIS
       chmod [OPTION]... MODE[,MODE]... FILE...
       chmod [OPTION]... OCTAL-MODE FILE...
       chmod [OPTION]... --reference=RFILE FILE...

DESCRIPTION
       This  manual page documents the GNU version of chmod.  chmod changes the file mode bits of each given
       file according to mode, which can be either a symbolic representation of changes to make, or an octal
       number representing the bit pattern for the new mode bits.

       The  format  of  a symbolic mode is [ugoa...][[+-=][perms...]...], where perms is either zero or more
       letters from the set rwxXst, or a single letter from the set ugo.  Multiple  symbolic  modes  can  be
       given, separated by commas.

       A  combination of the letters ugoa controls which users' access to the file will be changed: the user
       who owns it (u), other users in the file's group (g), other users not in the file's group (o), or all
       users  (a).   If  none of these are given, the effect is as if a were given, but bits that are set in
       the umask are not affected.

       The operator + causes the selected file mode bits to be added to the existing file mode bits of  each
       file;  -  causes  them to be removed; and = causes them to be added and causes unmentioned bits to be
       removed except that a directory's unmentioned set user and group ID bits are not affected.

       The letters rwxXst select file mode bits for the affected users: read (r),  write  (w),  execute  (or
       search  for  directories)  (x), execute/search only if the file is a directory or already has execute
       permission for some user (X), set user or group ID on execution  (s),  restricted  deletion  flag  or
       sticky  bit (t).  Instead of one or more of these letters, you can specify exactly one of the letters
       ugo: the permissions granted to the user who owns the file (u),  the  permissions  granted  to  other
       users  who are members of the file's group (g), and the permissions granted to users that are in nei‐
       ther of the two preceding categories (o).

       A numeric mode is from one to four octal digits (0-7), derived by adding up the bits with  values  4,
       2,  and  1.  Omitted digits are assumed to be leading zeros.  The first digit selects the set user ID
       (4) and set group ID (2) and restricted deletion or sticky (1) attributes.  The second digit  selects
       permissions  for  the user who owns the file: read (4), write (2), and execute (1); the third selects
       permissions for other users in the file's group, with the same values; and the fourth for other users
       not in the file's group, with the same values.

       chmod never changes the permissions of symbolic links; the chmod system call cannot change their per‐
       missions.  This is not a problem since the permissions of symbolic links are  never  used.   However,
       for  each  symbolic  link listed on the command line, chmod changes the permissions of the pointed-to
       file.  In contrast, chmod ignores symbolic links encountered during recursive directory traversals.

SETUID AND SETGID BITS
       chmod clears the set-group-ID bit of a regular file if the file's group ID does not match the  user's
       effective  group  ID  or  one  of the user's supplementary group IDs, unless the user has appropriate
       privileges.  Additional restrictions may cause the set-user-ID and set-group-ID bits of MODE or RFILE
       to  be ignored.  This behavior depends on the policy and functionality of the underlying chmod system
       call.  When in doubt, check the underlying system behavior.

       chmod preserves a directory's set-user-ID and set-group-ID bits unless you explicitly specify  other‐
       wise.   You  can set or clear the bits with symbolic modes like u+s and g-s, and you can set (but not
       clear) the bits with a numeric mode.

RESTRICTED DELETION FLAG OR STICKY BIT
       The restricted deletion flag or sticky bit is a single bit, whose interpretation depends on the  file
       type.  For directories, it prevents unprivileged users from removing or renaming a file in the direc‐
       tory unless they own the file or the directory; this is called the restricted deletion flag  for  the
       directory,  and is commonly found on world-writable directories like /tmp.  For regular files on some
       older systems, the bit saves the program's text image on the swap device so it will load more quickly
       when run; this is called the sticky bit.

OPTIONS
       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]))+'.

AUTHOR
       Written by David MacKenzie and Jim Meyering.

REPORTING BUGS
       Report chmod bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report chmod translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright  ©  2011  Free  Software  Foundation,  Inc.   License  GPLv3+:  GNU  GPL version 3 or later
       <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There  is  NO  WARRANTY,  to  the
       extent permitted by law.

SEE ALSO
       chmod(2)

       The  full  documentation for chmod is maintained as a Texinfo manual.  If the info and chmod programs
       are properly installed at your site, the command

              info coreutils 'chmod invocation'

       should give you access to the complete manual.



GNU coreutils 8.12.197-032bb                   September 2011                                       CHMOD(1)

Zie ook