CHMOD(1) General Commands Manual CHMOD(1)NAME
chmod - change mode
SYNOPSIS
chmod mode file ...
DESCRIPTION
The mode of each named file is changed according to mode, which may be absolute or symbolic. An absolute mode is an octal number con-
structed from the OR of the following modes:
4000 set user ID on execution
2000 set group ID on execution
1000 sticky bit, see chmod(2)
0400 read by owner
0200 write by owner
0100 execute (search in directory) by owner
0070 read, write, execute (search) by group
0007 read, write, execute (search) by others
A symbolic mode has the form:
[who] op permission [op permission] ...
The who part is a combination of the letters u (for user's permissions), g (group) and o (other). The letter a stands for ugo. If who is
omitted, the default is a but the setting of the file creation mask (see umask(2)) is taken into account.
Op can be + to add permission to the file's mode, - to take away permission and = to assign permission absolutely (all other bits will be
reset).
Permission is any combination of the letters r (read), w (write), x (execute), s (set owner or group id) and t (save text - sticky). Let-
ters u, g or o indicate that permission is to be taken from the current mode. Omitting permission is only useful with = to take away all
permissions.
The first example denies write permission to others, the second makes a file executable:
chmod o-w file
chmod +x file
Multiple symbolic modes separated by commas may be given. Operations are performed in the order specified. The letter s is only useful
with u or g.
Only the owner of a file (or the super-user) may change its mode.
SEE ALSO ls(1), chmod(2), chown (1), stat(2), umask(2)CHMOD(1)
Check Out this Related Man Page
CHMOD(1) General Commands Manual CHMOD(1)NAME
chmod - change mode
SYNOPSIS
chmod mode file ...
DESCRIPTION
The mode of each named file is changed according to mode, which may be an octal number or a symbolic change to the existing mode. A mode
is an octal number constructed from the OR of the following modes.
0400 read by owner
0200 write by owner
0100 execute (search in directory) by owner
0070 read, write, execute (search) by group
0007 read, write, execute (search) by others
A symbolic mode has the form:
[who] op permission
The who part is a combination of the letters u (for user's permissions), g (group) and o (other). The letter a stands for ugo. If who is
omitted, the default is a.
Op can be + to add permission to the file's mode, - to take away permission, and = to assign permission absolutely (all other bits will be
reset).
Permission is any combination of the letters r (read), w (write), x (execute), a (append only), and l (exclusive access).
Only the owner of a file or the group leader of its group may change the file's mode.
SOURCE
/sys/src/cmd/chmod.c
SEE ALSO ls(1), stat(2), stat(5)CHMOD(1)
hello everybody:
i think this is really quite of dummy question.
after I write a new script, and give it the execute permission.
some times its just enough to call its name to run the script , other times I need to include ksh or ./ScriptName .
so how I can make all my scripts run by just... (9 Replies)
I am trying to change permission for all subdirectories and files inside folder1 so this is what i came with after many seraches on the internet. man find and man chmod mirc and few articles.
find .public_html/folder1 -print0 | xargs -0 chmod 777
what's wrong with this command?
it is FTP... (33 Replies)
hi.
I want to set the default permission for ever new created file to rwxrwxrwx ..
I try umask 000 but it does't not give the execute persmission , is there any way to set the default permission for every new created file to rwxrwxrwx ..
thankx (9 Replies)
Hello
I have a new job and I need change the last user administrator, I dont know if is easier change some things about this user or add my user in the group with every permission, how can I do it. I dont know which is the group. I think is no only useradd en after modify /etc/passwd.
Tank... (14 Replies)
Hi all,
We have some files are under 744 permissions and the the owner is say owner1 and group1.
Now we have another user owner2 of group2, owner2 can remove files of the owner1 and the permission of those files are 744, unix admin told us he did some config at his side so we can do that.
... (14 Replies)
Hi..
I have 2 servers with linux suse10.
I made a mistake and on one of the servers changed with chmod the permission of root in directory /.
In the other servers the permissions are correct
Please i need a script, to change the permissions of one server 1, using the same permission of the... (11 Replies)
Hi,
Im struggling with what chmod to change the permission of a file in the current directory named MyFile so the command "cat MyFile" fails to display the file.?? (10 Replies)
Hi, I having an issue with file permission. To fix it I need to read the file's existing permission and re-apply the same permission to the file. This has to be done for every single file under a mount point. I'm novice in scripting. Help me with this in shell scripting.
# ls -l /dev/null... (10 Replies)
Hi Guys,
I want to know is there any method to create a file having 777 permission. I am aware of umask, since it is only giving max. 666 permission for files this is not fulfilling my needs.
Thanks in advance
---------- Post updated at 12:49 AM ---------- Previous update was at 12:31... (10 Replies)
hi,
sorry for posting this for a quick answer.
Is there a one line command to change permissions on files in a directory to a given mode (say 554) and only for those files that do not already have that mode?
Running chmod updates the last access/modified timestamp on the files, and i want to... (11 Replies)
Hey Guys,
First post here. I just started learning UNIX a few weeks ago.
My issue: I use FreeNAS which is based off of UNIX in my network environment which hosts files that my team needs to access. Each user has their own login but we are all part of a group called "ITLIC".
I have a share... (15 Replies)
Friends,
I have weird problem with my Linux OS.
I have few files which is owned by root but could not be modified (edit, chmod, chown etc)
# id
uid=0(root) gid=0(root) groups=0(root)
# whoami
root
# ls -l /etc/security/access-sshd.conf
-rw-r--r-- 1 root root 431 Jun 22 03:31... (12 Replies)
Hi All,
We have a scenario in production where we want only one user from a group to modify the file. The file is not set to write permission for application manager.
-r--r--r-- 1 amgr u00 15661716 Aug 30 00:06 DCI.dat
So here amgr will have permission to edit the file. We want a... (10 Replies)
Hi all together,
The US President considers this topic as not serious. Here in Germany there it's taken very serious, made a lot of words, but little action.
As far as I am reading now - written here quite clearly ... N.Y. Times - loosing earth or as video with the current state of... (37 Replies)