Comandos de la terminal/chmod

[rrc@Llawyr ~]$ 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.
With --reference, change the mode of each FILE to that of RFILE.

  -c, --changes          like verbose but report only when a change is made
  -f, --silent, --quiet  suppress most error messages
  -v, --verbose          output a diagnostic for every file processed
      --no-preserve-root  do not treat '/' specially (the default)
      --preserve-root    fail to operate recursively on '/'
      --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]))+|[-+=][0-7]+'.

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/>
For complete documentation, run: info coreutils 'chmod invocation'

[rrc@Llawyr ~]$ chmod --version
chmod (GNU coreutils) 8.21
Copyright (C) 2013 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.

Written by David MacKenzie and Jim Meyering.

[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rw------- 1 rrc rrc 1359 Nov 16 13:16 typescript
[rrc@Llawyr ComandosDeLaTerminal]$ chmod a+x typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwx--x--x 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod g-x,o-x typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwx------ 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod u=rwx,g=rx,o=rx typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxr-xr-x 1 rrc rrc 1359 Nov 16 13:16 typescript

[rrc@Llawyr ComandosDeLaTerminal]$ chmod -R o-rx Carpeta1/
[rrc@Llawyr ComandosDeLaTerminal]$ ls -alR Carpeta1
Carpeta1:
total 12
drwxr-x---  3 rrc rrc 4096 Mar  5 11:45 ./
drwx------ 14 rrc rrc 4096 Mar  5 16:50 ../
drwxr-x---  3 rrc rrc 4096 Mar  4 12:44 Carpeta2/
lrwxrwxrwx  1 rrc rrc   11 Mar  5 11:45 ChownPrueba -> ChownPrueba

Carpeta1/Carpeta2:
total 12
drwxr-x--- 3 rrc rrc 4096 Mar  4 12:44 ./
drwxr-x--- 3 rrc rrc 4096 Mar  5 11:45 ../
drwxr-x--- 2 rrc rrc 4096 Mar  4 12:44 Carpeta3/

Carpeta1/Carpeta2/Carpeta3:
total 8
drwxr-x--- 2 rrc rrc 4096 Mar  4 12:44 ./
drwxr-x--- 3 rrc rrc 4096 Mar  4 12:44 ../

[rrc@Llawyr ComandosDeLaTerminal]$ chmod 775 Carpeta1
[rrc@Llawyr ComandosDeLaTerminal]$ ls -ald Carpeta1
drwxrwxr-x 3 rrc rrc 4096 Mar  5 11:45 Carpeta1/

[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxr-x--- 1 rrc rrc 1359 Nov 16 13:16 typescript*
[rrc@Llawyr ComandosDeLaTerminal]$ chmod 1775 typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwxr-t 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod 2775 typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwsr-x 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod 4775 typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwsrwxr-x 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod u-s typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwxr-x 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod 2775 typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwsr-x 1 rrc rrc 1359 Nov 16 13:16 typescript*
[rrc@Llawyr ComandosDeLaTerminal]$ chmod g-s typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwxr-x 1 rrc rrc 1359 Nov 16 13:16 typescript*

[rrc@Llawyr ComandosDeLaTerminal]$ chmod 1775 typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwxr-t 1 rrc rrc 1359 Nov 16 13:16 typescript*
[rrc@Llawyr ComandosDeLaTerminal]$ chmod o-s typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwxr-t 1 rrc rrc 1359 Nov 16 13:16 typescript*
[rrc@Llawyr ComandosDeLaTerminal]$ chmod o-t typescript 
[rrc@Llawyr ComandosDeLaTerminal]$ ls -al typescript 
-rwxrwxr-x 1 rrc rrc 1359 Nov 16 13:16 typescript*