How to login as different user inside shell script and execute a set of commands?

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My requirement is to login as a different user which requires password authentication and execute some commands as that user inside a shell script which I run from my user account.

example: user1 is executing the script. Requirement is to login as user2 using password and execute set of commands using a single shell script.

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

Is password authentication required? Solutions I can think of would require the password to be stored more or less unencrypted in the script, which should not be done. If possible, I would prefer to use ssh otheruser@localhost with keypair for authentication.
â€“Â Philippos
Apr 26 '17 at 5:55

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up vote
1
down vote

favorite

My requirement is to login as a different user which requires password authentication and execute some commands as that user inside a shell script which I run from my user account.

example: user1 is executing the script. Requirement is to login as user2 using password and execute set of commands using a single shell script.

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

Is password authentication required? Solutions I can think of would require the password to be stored more or less unencrypted in the script, which should not be done. If possible, I would prefer to use ssh otheruser@localhost with keypair for authentication.
â€“Â Philippos
Apr 26 '17 at 5:55

add a commentÂ |Â

up vote
1
down vote

favorite

My requirement is to login as a different user which requires password authentication and execute some commands as that user inside a shell script which I run from my user account.

example: user1 is executing the script. Requirement is to login as user2 using password and execute set of commands using a single shell script.

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

My requirement is to login as a different user which requires password authentication and execute some commands as that user inside a shell script which I run from my user account.

example: user1 is executing the script. Requirement is to login as user2 using password and execute set of commands using a single shell script.

bash shell-script

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

asked Apr 26 '17 at 4:32

Girish Sunkara

3132613

Is password authentication required? Solutions I can think of would require the password to be stored more or less unencrypted in the script, which should not be done. If possible, I would prefer to use ssh otheruser@localhost with keypair for authentication.
â€“Â Philippos
Apr 26 '17 at 5:55

add a commentÂ |Â

Is password authentication required? Solutions I can think of would require the password to be stored more or less unencrypted in the script, which should not be done. If possible, I would prefer to use ssh otheruser@localhost with keypair for authentication.
â€“Â Philippos
Apr 26 '17 at 5:55

Is password authentication required? Solutions I can think of would require the password to be stored more or less unencrypted in the script, which should not be done. If possible, I would prefer to use ssh otheruser@localhost with keypair for authentication.
â€“Â Philippos
Apr 26 '17 at 5:55

add a commentÂ |Â

2 Answers
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4
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You can use several ways:

Using su. Via su you can exec the command on this way:

su user -c "command"

su - user -c "command"

the difference is when you have dash you will get the environment of target user. With this command you will be asked for the password of target user

Using sudo:

sudo -u user "command"

With this command you execute it with or without password (your password)

Using ssh:

With ssh you can exec the command with password for user, password for the key (if any)

ssh user@localhost "command"

P.S. There are also other possible methods which are rarely possible like rsh

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

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Using the command su [username] allows you to run a command in the context of that user, from the current location. Using the following command su - [username] switches you to that users home directory.
If you omit the username you are switching to root.

answered Apr 26 '17 at 5:42

Graham Harris

111

And the password? Do you want to source it plain from the script? You'd need to sudo the script to avoid be promted for the password.
â€“Â Philippos
Apr 26 '17 at 5:58

add a commentÂ |Â

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
4
down vote

You can use several ways:

Using su. Via su you can exec the command on this way:

su user -c "command"

su - user -c "command"

the difference is when you have dash you will get the environment of target user. With this command you will be asked for the password of target user

Using sudo:

sudo -u user "command"

With this command you execute it with or without password (your password)

Using ssh:

With ssh you can exec the command with password for user, password for the key (if any)

ssh user@localhost "command"

P.S. There are also other possible methods which are rarely possible like rsh

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

add a commentÂ |Â

up vote
4
down vote

You can use several ways:

Using su. Via su you can exec the command on this way:

su user -c "command"

su - user -c "command"

the difference is when you have dash you will get the environment of target user. With this command you will be asked for the password of target user

Using sudo:

sudo -u user "command"

With this command you execute it with or without password (your password)

Using ssh:

With ssh you can exec the command with password for user, password for the key (if any)

ssh user@localhost "command"

P.S. There are also other possible methods which are rarely possible like rsh

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

add a commentÂ |Â

up vote
4
down vote

You can use several ways:

Using su. Via su you can exec the command on this way:

su user -c "command"

su - user -c "command"

the difference is when you have dash you will get the environment of target user. With this command you will be asked for the password of target user

Using sudo:

sudo -u user "command"

With this command you execute it with or without password (your password)

Using ssh:

With ssh you can exec the command with password for user, password for the key (if any)

ssh user@localhost "command"

P.S. There are also other possible methods which are rarely possible like rsh

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

You can use several ways:

Using su. Via su you can exec the command on this way:

su user -c "command"

su - user -c "command"

the difference is when you have dash you will get the environment of target user. With this command you will be asked for the password of target user

Using sudo:

sudo -u user "command"

With this command you execute it with or without password (your password)

Using ssh:

With ssh you can exec the command with password for user, password for the key (if any)

ssh user@localhost "command"

P.S. There are also other possible methods which are rarely possible like rsh

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

answered Apr 26 '17 at 6:46

Romeo Ninov

4,47311625

add a commentÂ |Â

up vote
0
down vote

answered Apr 26 '17 at 5:42

Graham Harris

111

And the password? Do you want to source it plain from the script? You'd need to sudo the script to avoid be promted for the password.
â€“Â Philippos
Apr 26 '17 at 5:58

add a commentÂ |Â

up vote
0
down vote

answered Apr 26 '17 at 5:42

Graham Harris

111

And the password? Do you want to source it plain from the script? You'd need to sudo the script to avoid be promted for the password.
â€“Â Philippos
Apr 26 '17 at 5:58

add a commentÂ |Â

up vote
0
down vote

answered Apr 26 '17 at 5:42

Graham Harris

111

answered Apr 26 '17 at 5:42

Graham Harris

111

answered Apr 26 '17 at 5:42

Graham Harris

111

answered Apr 26 '17 at 5:42

Graham Harris

111

answered Apr 26 '17 at 5:42

Graham Harris

111

And the password? Do you want to source it plain from the script? You'd need to sudo the script to avoid be promted for the password.
â€“Â Philippos
Apr 26 '17 at 5:58

add a commentÂ |Â

And the password? Do you want to source it plain from the script? You'd need to sudo the script to avoid be promted for the password.
â€“Â Philippos
Apr 26 '17 at 5:58

And the password? Do you want to source it plain from the script? You'd need to sudo the script to avoid be promted for the password.
â€“Â Philippos
Apr 26 '17 at 5:58

add a commentÂ |Â

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