How to add link to a device permanently

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Using the command: ln -s /dev/ttyUSB0 /dev/gps0 I link the device gps0 to ttyUSB0. The problem is after rebooting the machine, the created link will disappear and I should create it again. Is there any way to create the link permanently?

The OS is CentOS 7.

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

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The OS is CentOS 7.

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

add a commentÂ |Â

up vote
0
down vote

favorite

The OS is CentOS 7.

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

The OS is CentOS 7.

centos symlink udev

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

asked Oct 1 at 13:33

Soheil Pourbafrani

1032

add a commentÂ |Â

2 Answers
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Given the name of your device --- /dev/gps0 --- I assume that you're dealing with some sort of GPS device. If so, your best bet would be to define a custom udev rule that matches the device and creates a device with the name that you want. Arch Linux's udev wiki might help to get you started; I don't think there will be fundamental differences between that and CentOS.

answered Oct 1 at 13:47

Andy Dalton

4,9791520

Thanks, I read about the udev. Could you pls give me an example?
â€“Â Soheil Pourbafrani
Oct 1 at 13:55

1

Unfortunately I don't have a Linux machine in front of me. Did you see the wiki to which I referred you? The bit that talks about 83-webcam.rules is very similar to what you're after. You'll want to use udevadm to find out properties of your GPS (e.g., vendor, product id), and create a rule that generates the symlink.
â€“Â Andy Dalton
Oct 1 at 14:00

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Add it /etc/rc.local. Make sure /etc/rc.local is executable.

vim /etc/rc.local
ln -s /dev/ttyUSB0 /dev/gps0

ls -l /etc/rc.local 
lrwxrwxrwx. 1 root root 13 Sep 26 05:46 /etc/rc.local -> rc.d/rc.local

edited Oct 1 at 13:51

answered Oct 1 at 13:43

EBIN GLADSON

3316

I did but after reboot, it didn't create the link. Maybe because the command needs sudo privileges
â€“Â Soheil Pourbafrani
Oct 1 at 13:57

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2 Answers
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2 Answers
2

active

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up vote
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answered Oct 1 at 13:47

Andy Dalton

4,9791520

Thanks, I read about the udev. Could you pls give me an example?
â€“Â Soheil Pourbafrani
Oct 1 at 13:55

1

Unfortunately I don't have a Linux machine in front of me. Did you see the wiki to which I referred you? The bit that talks about 83-webcam.rules is very similar to what you're after. You'll want to use udevadm to find out properties of your GPS (e.g., vendor, product id), and create a rule that generates the symlink.
â€“Â Andy Dalton
Oct 1 at 14:00

add a commentÂ |Â

up vote
1
down vote

answered Oct 1 at 13:47

Andy Dalton

4,9791520

Thanks, I read about the udev. Could you pls give me an example?
â€“Â Soheil Pourbafrani
Oct 1 at 13:55

1

Unfortunately I don't have a Linux machine in front of me. Did you see the wiki to which I referred you? The bit that talks about 83-webcam.rules is very similar to what you're after. You'll want to use udevadm to find out properties of your GPS (e.g., vendor, product id), and create a rule that generates the symlink.
â€“Â Andy Dalton
Oct 1 at 14:00

add a commentÂ |Â

up vote
1
down vote

answered Oct 1 at 13:47

Andy Dalton

4,9791520

answered Oct 1 at 13:47

Andy Dalton

4,9791520

answered Oct 1 at 13:47

Andy Dalton

4,9791520

answered Oct 1 at 13:47

Andy Dalton

4,9791520

answered Oct 1 at 13:47

Andy Dalton

4,9791520

Thanks, I read about the udev. Could you pls give me an example?
â€“Â Soheil Pourbafrani
Oct 1 at 13:55

1

Unfortunately I don't have a Linux machine in front of me. Did you see the wiki to which I referred you? The bit that talks about 83-webcam.rules is very similar to what you're after. You'll want to use udevadm to find out properties of your GPS (e.g., vendor, product id), and create a rule that generates the symlink.
â€“Â Andy Dalton
Oct 1 at 14:00

add a commentÂ |Â

Thanks, I read about the udev. Could you pls give me an example?
â€“Â Soheil Pourbafrani
Oct 1 at 13:55

1

Unfortunately I don't have a Linux machine in front of me. Did you see the wiki to which I referred you? The bit that talks about 83-webcam.rules is very similar to what you're after. You'll want to use udevadm to find out properties of your GPS (e.g., vendor, product id), and create a rule that generates the symlink.
â€“Â Andy Dalton
Oct 1 at 14:00

Thanks, I read about the udev. Could you pls give me an example?
â€“Â Soheil Pourbafrani
Oct 1 at 13:55

Unfortunately I don't have a Linux machine in front of me. Did you see the wiki to which I referred you? The bit that talks about 83-webcam.rules is very similar to what you're after. You'll want to use udevadm to find out properties of your GPS (e.g., vendor, product id), and create a rule that generates the symlink.
â€“Â Andy Dalton
Oct 1 at 14:00

add a commentÂ |Â

up vote
0
down vote

Add it /etc/rc.local. Make sure /etc/rc.local is executable.

vim /etc/rc.local
ln -s /dev/ttyUSB0 /dev/gps0

ls -l /etc/rc.local 
lrwxrwxrwx. 1 root root 13 Sep 26 05:46 /etc/rc.local -> rc.d/rc.local

edited Oct 1 at 13:51

answered Oct 1 at 13:43

EBIN GLADSON

3316

I did but after reboot, it didn't create the link. Maybe because the command needs sudo privileges
â€“Â Soheil Pourbafrani
Oct 1 at 13:57

add a commentÂ |Â

up vote
0
down vote

Add it /etc/rc.local. Make sure /etc/rc.local is executable.

vim /etc/rc.local
ln -s /dev/ttyUSB0 /dev/gps0

ls -l /etc/rc.local 
lrwxrwxrwx. 1 root root 13 Sep 26 05:46 /etc/rc.local -> rc.d/rc.local

edited Oct 1 at 13:51

answered Oct 1 at 13:43

EBIN GLADSON

3316

I did but after reboot, it didn't create the link. Maybe because the command needs sudo privileges
â€“Â Soheil Pourbafrani
Oct 1 at 13:57

add a commentÂ |Â

up vote
0
down vote

Add it /etc/rc.local. Make sure /etc/rc.local is executable.

vim /etc/rc.local
ln -s /dev/ttyUSB0 /dev/gps0

ls -l /etc/rc.local 
lrwxrwxrwx. 1 root root 13 Sep 26 05:46 /etc/rc.local -> rc.d/rc.local

edited Oct 1 at 13:51

answered Oct 1 at 13:43

EBIN GLADSON

3316

Add it /etc/rc.local. Make sure /etc/rc.local is executable.

vim /etc/rc.local
ln -s /dev/ttyUSB0 /dev/gps0

ls -l /etc/rc.local 
lrwxrwxrwx. 1 root root 13 Sep 26 05:46 /etc/rc.local -> rc.d/rc.local

edited Oct 1 at 13:51

answered Oct 1 at 13:43

EBIN GLADSON

3316

edited Oct 1 at 13:51

answered Oct 1 at 13:43

EBIN GLADSON

3316

answered Oct 1 at 13:43

EBIN GLADSON

3316

answered Oct 1 at 13:43

EBIN GLADSON

3316

I did but after reboot, it didn't create the link. Maybe because the command needs sudo privileges
â€“Â Soheil Pourbafrani
Oct 1 at 13:57

add a commentÂ |Â

I did but after reboot, it didn't create the link. Maybe because the command needs sudo privileges
â€“Â Soheil Pourbafrani
Oct 1 at 13:57

I did but after reboot, it didn't create the link. Maybe because the command needs sudo privileges
â€“Â Soheil Pourbafrani
Oct 1 at 13:57

add a commentÂ |Â

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