Change password with usermod

Change password with usermod

[Mário Gamito]

Hi,

I'm trying to set a password directly from a script, using usermod, but 
i get an error, i shouldn't get:

#!Bin/bash
groupadd postgres
useradd -g postgres postgres
PASS=`mkpasswd secret`
ID=`cat /etc/passwd | grep postgres | cut -f3 -d':'`
usermod -p $PASS -u $ID

This gives me:
"usermod: user 502 does not exist"

But the odd thing is that it exists with that uid.

Any ideas ?

Warm Regards,
Mário Gamito
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Change password with usermod

[Mário Gamito]

Hi,

I'm trying to set a password directly from a script, using usermod, but 
i get an error, i shouldn't get:

#!Bin/bash
groupadd postgres
useradd -g postgres postgres
PASS=`mkpasswd secret`
ID=`cat /etc/passwd | grep postgres | cut -f3 -d':'`
usermod -p $PASS -u $ID

This gives me:
"usermod: user 502 does not exist"

But the odd thing is that it exists with that uid.

Any ideas ?

Warm Regards,
Mário Gamito
-
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Re: Change password with usermod

[Mário Gamito]

Of course it isn't

#!Bin/bash

but

#!/bin/bash

Re: Change password with usermod

[Krzysztof Dubowik]

Hi,

Mário Gamito wrote:
> PASS=`mkpasswd secret`
> ID=`cat /etc/passwd | grep postgres | cut -f3 -d':'`
> usermod -p $PASS -u $ID
> 
> This gives me:
> "usermod: user 502 does not exist"

usermod needs a login name rather than the userid and you don't need -u
option:

# usermod -p $PASS postgres

However, I usually user chpasswd to change the password from a script, so
your script becomes:

# echo postgres:secret | chpasswd

Hope this helps,
Krzysztof

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Re: Change password with usermod

[Mário Gamito]

Hi,

Thank you for your answer.

> usermod needs a login name rather than the userid and you don't need -u
> option:
> 
> # usermod -p $PASS postgres
I tried that but didn't work for me:
"[root@mail ~]# usermod -p $PASS postgres
usage: usermod  [-u uid [-o]] [-g group] [[-a] -G group,...]
                 [-d home [-m]] [-s shell] [-c comment] [-l new_name]
                 [-f inactive] [-e expire ] [-p passwd] [-L|-U] name"


> However, I usually user chpasswd to change the password from a script, so
> your script becomes:
> 
> # echo postgres:secret | chpasswd
But this does :)

Thanks a bunch.

Warm Regards,
Mário Gamito
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Re: Change password with usermod

[Ian Ward Comfort]

On Mar 10, 2007, at 3:55 AM, Krzysztof Dubowik wrote:
> However, I usually user chpasswd to change the password from a  
> script, so your script becomes:
>
> # echo postgres:secret | chpasswd

A better idea is to:

# chpasswd < passfile

where passfile has been created with the contents:

postgres:secret

That prevents your new password from appearing momentarily in the  
process list during this procedure.

—IWC

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