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Establishing a mail-only account?

Kernel 2.6.7 for FC2 - when?

Another 802.11g suggestion thread

david

Tuesday, 27 July 2004 Tue, 27 Jul '04

12:38 p.m.

Folks Is there a way to define a user account for a remote user such that the user can ONLY retrieve his/her mail via POP3 or IMAP, and cannot run any other functionality (such as shell, or ftp?) I am running FC2 server, command line only. Thanks David

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Alexander Dalloz

Tuesday, 27 July Tue, 27 Jul

12:45 p.m.

Am Di, den 27.07.2004 schrieb david um 19:38:

Is there a way to define a user account for a remote user such that the user can ONLY retrieve his/her mail via POP3 or IMAP, and cannot run any other functionality (such as shell, or ftp?) I am running FC2 server, command line only.

David

Edit /etc/passwd and change the shell set for the existing user to /bin/false. For new user creation use "useradd -s /bin/false". Alexander -- Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13 Fedora GNU/Linux Core 2 (Tettnang) kernel 2.6.6-1.435.2.3.ad.umlsmp Serendipity 19:43:51 up 1 day, 4:50, load average: 2.12, 1.68, 1.44

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Ding Li

12:55 p.m.

What's difference between /bin/false and /sbin/nologin? Thanks Alexander Dalloz wrote:

Am Di, den 27.07.2004 schrieb david um 19:38: >Is there a way to define a user account for a remote user such that the >user can ONLY retrieve his/her >mail via POP3 or IMAP, and cannot run any other functionality (such as >shell, or ftp?) > >I am running FC2 server, command line only. > > >David > > Edit /etc/passwd and change the shell set for the existing user to /bin/false. For new user creation use "useradd -s /bin/false". Alexander

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Brian Gaynor

1:19 p.m.

On Tue, 2004-07-27 at 10:55, Ding Li wrote:

What's difference between /bin/false and /sbin/nologin?

/sbin/nologin displays a configurable message that the account is not available, /bin/false does not. man login is your friend. -- Brian Gaynor Precision MicroControl Corp. e-mail: briang(a)pmccorp.com web: http://www.pmccorp.com phone: 760.930.0101 direct: 760.930.0485 x13 fax: 760.930.0222

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david

1:29 p.m.

At 11:19 AM 7/27/2004, you wrote:

On Tue, 2004-07-27 at 10:55, Ding Li wrote: > What's difference between /bin/false and /sbin/nologin? > /sbin/nologin displays a configurable message that the account is not available, /bin/false does not. man login is your friend. -- Brian Gaynor Precision MicroControl Corp.

Yes, Brian..... man login is indeed my friend. The real problem is that I didn't think to look there. I googled stuff like Linux Users, did man useradd, man pam, but never having typed in "login", I didn't think to look there. Man pages etc. have all the information; the problem is knowing where to look. Everyday I learn new things. Thanks David

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Rick Stevens

1:43 p.m.

david wrote:

At 11:19 AM 7/27/2004, you wrote: > On Tue, 2004-07-27 at 10:55, Ding Li wrote: > > What's difference between /bin/false and /sbin/nologin? > > > > /sbin/nologin displays a configurable message that the account is not > available, /bin/false does not. man login is your friend. > > -- > Brian Gaynor > Precision MicroControl Corp. Yes, Brian..... man login is indeed my friend. The real problem is that I didn't think to look there. I googled stuff like Linux Users, did man useradd, man pam, but never having typed in "login", I didn't think to look there. Man pages etc. have all the information; the problem is knowing where to look. Everyday I learn new things.

Keep this one in your toolbox: "man -k some-keyword", meaning "find me man pages that have 'some-keyword' in their description". This is the same as the "apropos" command. ---------------------------------------------------------------------- - Rick Stevens, Senior Systems Engineer rstevens(a)vitalstream.com - - VitalStream, Inc. http://www.vitalstream.com - - - - "Do you suffer from long-term memory loss?" "I don't remember" - - -- Chumbawumba, "Amnesia" (TubThumping) - ----------------------------------------------------------------------

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ne...

1:49 p.m.

On Jul 27, 2004 at 11:29, david in a soothing rage wrote:

At 11:19 AM 7/27/2004, you wrote: >On Tue, 2004-07-27 at 10:55, Ding Li wrote: > > What's difference between /bin/false and /sbin/nologin? > >/sbin/nologin displays a configurable message that the account is not >available, /bin/false does not. man login is your friend. Yes, Brian..... man login is indeed my friend. The real problem is that I didn't think to look there. I googled stuff like Linux Users, did man useradd, man pam, but never having typed in "login", I didn't think to look there.

Aktually, one thing you could use is 'man -k <word>'. This will print a list of man pages. From there you can test to see which man page is more appropiate. N.Emile... -- Registered Linux User # 125653 (http://counter.li.org) Switch to: http://www.speakeasy.net/refer/190653 Zombie processes haunting the computer 14:47:11 up 29 days, 8:02, 4 users, load average: 0.00, 0.00, 0.00

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Christian Loza

Wednesday, 28 July Wed, 28 Jul

10:36 a.m.

I believe there is no difference. Both may be scripts that deny usage of a terminal. There is a lot of ways to deny terminal access. I created my own in /bin/noAccess, so you can use any of them. On Tue, 2004-07-27 at 10:55 -0700, Ding Li wrote:

What's difference between /bin/false and /sbin/nologin? Thanks Alexander Dalloz wrote: >Am Di, den 27.07.2004 schrieb david um 19:38: > > > >>Is there a way to define a user account for a remote user such that the >>user can ONLY retrieve his/her >>mail via POP3 or IMAP, and cannot run any other functionality (such as >>shell, or ftp?) >> >>I am running FC2 server, command line only. >> >> > > > >>David >> >> > >Edit /etc/passwd and change the shell set for the existing user to >/bin/false. For new user creation use "useradd -s /bin/false". > >Alexander > > > >

-- Christian Loza <christianl(a)unete.com.bo> UNETE Telecomunicaciones Ltda.

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Edward Croft

10:39 a.m.

On Wed, 2004-07-28 at 11:36, Christian Loza wrote:

> >Edit /etc/passwd and change the shell set for the existing user to > >/bin/false. For new user creation use "useradd -s /bin/false". > > > >Alexander > > > > > >

You can also use usermod -s /bin/false username to modify current users rather than editing the /etc/passwd file. -- Edward M. Croft Sr. Systems Engineer Open Ratings, Inc. 200 West Street Waltham, MA 02451-1121

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Kenneth Porter

Thursday, 5 August Thu, 5 Aug

9:53 p.m.

--On Wednesday, July 28, 2004 11:39 AM -0400 Edward Croft <ecroft(a)OPENRATINGS.com> wrote:

On Wed, 2004-07-28 at 11:36, Christian Loza wrote: > > > Edit /etc/passwd and change the shell set for the existing user to > > > /bin/false. For new user creation use "useradd -s /bin/false". You can also use usermod -s /bin/false username to modify current users rather than editing the /etc/passwd file.

chsh (change shell) was designed for this function.

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9 comments

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participants (9)

Alexander Dalloz
Brian Gaynor
Christian Loza
david
Ding Li
Edward Croft
Kenneth Porter
ne...
Rick Stevens