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Full Discussion: Sudo access issue
Operating Systems Linux Red Hat Sudo access issue Post 302900707 by alister on Thursday 8th of May 2014 10:32:50 AM
Old 05-08-2014
Quote:
Originally Posted by saurau
Hi,

I have given access to user mwadmin in shudders file as :

mwadmin ALL:NOPASSWD:/www/* /usr/* /opt/*

However, not able to execute below command:

sudo mkdir -p /usr/test
[sudo] password for mwadmin:
Sorry, user mwadmin is not allowed to execute '/bin/mkdir -p /usr/test' as root.

Quote:
Originally Posted by saurau
We need a user to have all permissions under /usr Dir which is owned by root.
Even if you set that up correctly, on your system, according to the diagnostic message, mkdir isn't under the /usr hierarchy.

More importantly, as I said, there are multiple errors in your attempt at a sudoers entry.

Did you edit sudoers using visudo? I suspect not, because it would have detected a syntax error (it should be an equals sign after the host specification, not a colon).

Aside from that, there are other non-syntactic, logical errors. Command specifications are comma-delimited. Your command specification will be treated as one long spec, not three. Only files in /www/ will match and the other two patterns are used to restrict the command's arguments.

Even if you delimited the command specifications correctly, the wildcards would not behave as you expect. As with shell pattern matching (aka globbing), the * will not match /. This means that /usr/* only matches files in /usr. It will match /usr/bin/, the directory itself, but not any of the executables of interest in /usr/bin and /usr/sbin.

Wildcards are unnecessary to match all files in a directory. The command specification can list a directory directly and that will be interpreted as matching any executable within it.

You really should spend an evening with the sudo, sudoers, and visudo documentation and inform yourself.

Regards,
Alister
This User Gave Thanks to alister For This Post:
 

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csp_helper(1)							  USER COMMANDS 						     csp_helper(1)

  NAME
      csp_helper - A collection of caspar helper scripts

  SYNOPSIS
      csp_install dir (directory) file (file)

      csp_mkdircp dir (directory) file (file)

      csp_scp_keep_mode h ([user@]host) dir (directory) file (file)

      csp_sucp h ([user@]host) dir (directory) file (file)

  DESCRIPTION
      The  scripts  csp_install,  csp_mkdircp,	csp_scp_keep_mode  and csp_sucp are helpers for caspar(7). These scripts typically are not invoked
      directly, but via a Makefile which uses caspar. See the notes on	csp_PUSH  in  caspar(7)  for  information  on  how  to	link  csp_install,
      csp_scp_keep_mode and csp_sucp to caspar.

  install DESCRIPTION
      csp_install creates the required directory (if needed) and installs the file, preserving timestamps. It uses install(1).

  install EXAMPLES
       csp_INSTALL_OPTIONS='--owner=www-data --group=www-data' 
	csp_INSTALL_MODE=ugo=r 
	csp_install /srv/www index.html

       csp_INSTALL_MODE=u=rwx,go= csp_install /usr/local/sbin mkpasswd

  install ENVIRONMENT
      csp_install honors csp_INSTALL_OPTIONS and csp_INSTALL_MODE (default is u=rw,go=r).

  mkdircp DESCRIPTION
      csp_mkdircp calls mkdir(1) and cp(1).

  scp_keep_mode DESCRIPTION
      csp_scp_keep_mode  uses  ssh to copy a file to a remote host, keeping its file permission mode. The trick used is a combination of mktemp(1)
      and mv(1).  Useful if you'd like to be sure a file gets installed e.g. group writable, without fiddling with permission bits on  the  remote
      host.

  scp_keep_mode EXAMPLE
	chmod g+w rc
	csp_scp_keep_mode root@gandalf /etc/uruk rc

  scp_keep_mode ENVIRONMENT
      csp_scp_keep_mode honors csp_SSH ("ssh" by default).

  sucp DESCRIPTION
      csp_sucp calls cat(1) from within sudo(1) from within ssh(1). This allows one to copy files to accounts on hosts one can only reach by call-
      ing sudo on the ssh-reachable remote host.

      Typically, one wants to install a root-owned file, but one does not want to allow access to the root-account directly  from  ssh.  Typically
      sudo is used as an extra line of defense.

  sucp EXAMPLES
      Some examples:

	csp_sucp rms@bilbo /etc fstab

	csp_sucp monty-python commit/ trailer.txt

  sucp BUGS
      If  NOPASSWD  is	not  set in the sudoers(5) file, and one's timestamp is expired, csp_sucp will forward the sudo password prompt. The given
      password will be echoed on the console!

  AUTHOR
      Joost van Baal-Ili

  SEE ALSO
      caspar(7) The caspar homepage is at http://mdcc.cx/caspar/ .

  csp_helper 20120514						      14 mai 2012						       csp_helper(1)
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