KrzysztofChojnowski at 08:25, 8 June 2020

2020-06-08T08:25:35Z

← Older revision		Revision as of 08:25, 8 June 2020
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	<pre>sudo minicom -b 115200 -D /dev/ttyUSB0 -s</pre>		<pre>sudo minicom -b 115200 -D /dev/ttyUSB0 -s</pre>

	Enter ''Serial port setup'', press ''F'' to disable hardware flow control, press ''Enter'', choose ''Exit'', now you can log in. It is strongly recommended to change the default passwords of existing users. To do that enter ''passwd <user_name>'' command, you will be prompted to enter password twice:		Enter ''Serial port setup'', press ''F'' to disable hardware flow control, press ''Enter'', choose ''Exit'', now you can log in as root (password root) or som (password som). It is strongly recommended to change the default passwords of existing users. To do that enter ''passwd <user_name>'' command, you will be prompted to enter password twice:
	<pre>root@somlabs:~# passwd root		<pre>root@somlabs:~# passwd root
	Enter new UNIX password:		Enter new UNIX password:

KrzysztofChojnowski at 10:36, 1 November 2019

2019-11-01T10:36:46Z

← Older revision		Revision as of 10:36, 1 November 2019
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	{{PageHeader\|Connecting to Linux console}} __toc__		{{PageHeader\|Connecting to Linux console}} __toc__
	= Linux =		= Linux host PC =
	== Prerequisites ==		== Prerequisites ==
	* PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or local network connection (for SSH connection)		* PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or local network connection (for SSH connection)
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	Now you can log in as tom with SSH client.		Now you can log in as tom with SSH client.

	= Windows =		= Windows host PC =
	== Prerequisites ==		== Prerequisites ==
	* PC with Windows operating system and USB port (for USB-UART converter connection) or local network connection (for SSH connection)		* PC with Windows operating system and USB port (for USB-UART converter connection) or local network connection (for SSH connection)

KrzysztofChojnowski: Created page with "{{PageHeader|Connecting to Linux console}} toc = Linux = == Prerequisites == * PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or lo..."

2019-11-01T10:33:37Z

Created page with "{{PageHeader|Connecting to Linux console}} __toc__ = Linux = == Prerequisites == * PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or lo..."

New page

{{PageHeader|Connecting to Linux console}} __toc__
= Linux =
== Prerequisites ==
* PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or local network connection (for SSH connection)
* VisionCB-STD board with VisionSOM-6ULL and Linux image installed
* Micro-USB cable

== Connecting to Linux console through UART-USB converter ==
VisionCB-STD has built-in UART-USB converter, it lets you connect to the console via virtual COM port. First of all you need to determine what is the VisionCB-STD virtual COM number on your Linux system. To do that connect VisionCB-STD board to your PC with micro-USB cable and list your terminal devices:

<pre>ls /dev/ttyUSB*
/dev/ttyUSB0</pre>

If there is only one device then it is the terminal you are looking for (/dev/ttyUSB0 in the example above), if there are more ''/dev/ttyUSB*'' terminal then disconnect and reconnect your board to find proper one.

Now install minicom:

<pre>sudo apt install minicom</pre>

Start minicom:
<pre>sudo minicom -b 115200 -D /dev/ttyUSB0 -s</pre>

Enter ''Serial port setup'', press ''F'' to disable hardware flow control, press ''Enter'', choose ''Exit'', now you can log in. It is strongly recommended to change the default passwords of existing users. To do that enter ''passwd <user_name>'' command, you will be prompted to enter password twice:
<pre>root@somlabs:~# passwd root
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@somlabs:~#
</pre>

To exit minicom press ''Ctrl+A'', ''Z'', ''X'', then confirm by pressing ''Enter''.

== Connecting to Linux console via SSH client ==
=== Connecting as root - not recommended ===
Login to the UART-USB console as described in the previous section and change the root password. Once you have changed it (still via UART-USB connection) you need to modify /etc/ssh/sshd_config file:
<pre>nano /etc/ssh/sshd_config</pre>
Add line:
<pre>PermitRootLogin yes</pre>
Restart SSH service:
<pre>service sshd restart</pre>
Now you can log in as root via SSH, you only need IP address of VisionSOM-6ULL. Enter ''ip a'' for list of all network interfaces and their IP addresses:
<pre>root@somlabs:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether a6:e3:1c:a0:3d:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.25/24 brd 192.168.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 2a02:a310:813c:d700:a4e3:1cff:fea0:3db0/64 scope global mngtmpaddr dynamic
valid_lft 974055sec preferred_lft 369255sec
inet6 fe80::a4e3:1cff:fea0:3db0/64 scope link
valid_lft forever preferred_lft forever
3: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default
link/sit 0.0.0.0 brd 0.0.0.0</pre>

In this case the IP address of the Ethernet (eth0) interface is 192.168.0.25. Now you can connect to VisionSOM-6ULL with SSH client from your Linux host PC:

<pre>ssh root@192.168.0.25</pre>

=== Connecting as regular user ===
To connect as a regular user you need to create new account or use existing one. In the first case login as root through USB-UART converter or SSH, and add a new account and set password:
<pre>root@somlabs:~# useradd tom
root@somlabs:~# passwd tom
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@somlabs:~#
</pre>

By default new user has no home directory and his shell is /bin/sh. To create home directory enter:
<pre>root@somlabs:~# mkdir /home/tom</pre>
To change shell to bash enter:
<pre>root@somlabs:~# chsh -s /bin/bash tom</pre>

Now you can log in as tom with SSH client.

= Windows =
== Prerequisites ==
* PC with Windows operating system and USB port (for USB-UART converter connection) or local network connection (for SSH connection)
* VisionCB-STD board with VisionSOM-6ULL and Linux image installed
* Micro-USB cable
* [http://www.putty.org/ PuTTY terminal]

== Connecting to Linux console through UART-USB converter ==
VisionCB-STD has built-in UART-USB converter, it lets you connect to Linux console via virtual COM port. First of all you need to determine what is the VisionCB-STD virtual COM number on your Windows system, to do that open ''Control Panel'', connect VisionCB-STD to your computer, find ''Ports (COM & LPT)'' and expand it. You should see ''USB Serial Port (COM<port_number>)'', if there is only one item with this name then it is your port, if there are more ports then disconnect and reconnect VisionCB-STD to check which port shows up.
Now we can connect with PuTTY to your VisionSOM-6ULL, connect VisionCB-STD to your PC, run PuTTY and:
* Select ''Serial'' in ''Connection type'' section
* Enter VisionCB-STD port number in ''Serial line'' field
* Enter 115200 in ''Speed'' field
* Click ''Open''

Now you can log in using one of existing user names. It is strongly recommended to change the default passwords of existing users. To do that enter ''passwd <user_name>'' command, you will be prompted to enter password twice:
<pre>root@somlabs:~# passwd root
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@somlabs:~#
</pre>

== Connecting to Linux console via SSH client ==
=== Connecting as root - not recommended ===
Login to the UART-USB console as described in the previous section and change the root password. Once you have changed it (still via UART-USB connection) you need to modify /etc/ssh/sshd_config file:
<pre>nano /etc/ssh/sshd_config</pre>
Add line:
<pre>PermitRootLogin yes</pre>
Restart SSH service:
<pre>service sshd restart</pre>
Now you can log in as root via SSH, you only need IP address of VisionSOM-6ULL. Enter ''ip a'' for list of all network interfaces and their IP addresses:
<pre>root@somlabs:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether a6:e3:1c:a0:3d:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.25/24 brd 192.168.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 2a02:a310:813c:d700:a4e3:1cff:fea0:3db0/64 scope global mngtmpaddr dynamic
valid_lft 974055sec preferred_lft 369255sec
inet6 fe80::a4e3:1cff:fea0:3db0/64 scope link
valid_lft forever preferred_lft forever
3: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default
link/sit 0.0.0.0 brd 0.0.0.0</pre>

In this case the IP address of the Ethernet (eth0) interface is 192.168.0.25. Now you can connect to VisionSOM-6ULL with SSH client from your Windows host PC:

* Start PuTTY
* Enter VisionSOM-6ULL IP address in ''Host Name'' field
* Click ''Open'' button

[[File:Visionsom-6ull-putty.jpg|center|PuTTY connection window]]

=== Connecting as regular user ===
To connect as a regular user you need to create new account or use existing one. In the first case login as root through USB-UART converter or SSH, and add a new account and set password:
<pre>root@somlabs:~# useradd tom
root@somlabs:~# passwd tom
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@somlabs:~#
</pre>

By default new user has no home directory and his shell is /bin/sh. To create home directory enter:
<pre>root@somlabs:~# mkdir /home/tom</pre>
To change shell to bash enter:
<pre>root@somlabs:~# chsh -s /bin/bash tom</pre>

Now you can log in as tom with SSH client.

Connecting to Linux console - Revision history

KrzysztofChojnowski at 08:25, 8 June 2020

KrzysztofChojnowski at 10:36, 1 November 2019

KrzysztofChojnowski: Created page with "{{PageHeader|Connecting to Linux console}} __toc__ = Linux = == Prerequisites == * PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or lo..."

KrzysztofChojnowski: Created page with "{{PageHeader|Connecting to Linux console}} toc = Linux = == Prerequisites == * PC with Ubuntu 16.04 operating system and USB port (for USB-UART converter connection) or lo..."