As we all know, we can connect wired Ethernet by this way. When there is no Ubuntu desktop GUI, however, i have found no way to connect or disconnect that wired Ethernet.
Moreover, i am using campus network. That means what should i do is click "Turn Off" or "Turn On"，and i don't have to enter a broadband account and password.
So are there any terminal commands can realize the clicking of "Turn Off" or "Turn On" ?
Yes you can but using the ifconfig command
Assuming that this is your only port then it will have the tag of eth0
Which will mean the command is
sudo ifconfig eth0 down
Down switches the port off, if I want to turn it on the command is
sudo ifconfig eth0 up
Handy guide for some Linux Terminal commands to do with ifconfig https://www.tecmint.com/ifconfig-command-examples/#:~:text=The%20“down”%20or%20“ifdown,is%20in%20an%20inactive%20state.
Related
Trying to ssh a switch from Putty through a Router that works when doing if I connect first to the router via console cable and when there I SSH the switch then it works but when trying to do it from putty it says Network error: connection timeout
I just found the solutions. In windows Just went to the Inbounds rule for in Windows Defender Firewall with Advanced Security and then set inbounds and outbounds rules allowing TCP port and another rule for Allowing another subnet witch the one you want to SSH.
On Mac Using terminal type sudo nano /etc/ssh/ssh_config then Un-comment the line: Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc
Press Ctrl + X. Press Enter to save and exit.
I have a Raspberry Pi 3B+ which I have to admit has only recently shown this problem.
I booted up the Pi normally and tried to SSH into it since I have a static IP set for it. This was unsuccesful, so I connected my monitor and keyboard, and run ifconfig to see the current IP address. After checking to see if my laptop is connected to the same WiFi network as the Pi, I tried SSH-ing into the Pi with no success: sh: connect to host xxx.xxx.xxx.xxx port 22: Connection timed out or Reply from xxx.xxx.xxx.xxx: Destination host unreachable..
My Pi has the SSH interface option enabled and can use it's internet connectivity as I could PING www.google.com with success and can also run sudo apt update && sudo apt upgrade.
I tried rebooting thinking this is a power issue, using a different socket / charger, restarting dhcpcd.service. No success, so I got curious.
I have connected a WiFi dongle onto the Pi, enabling the wlan1 interface which immediately discovered and connected to the WiFi network (it is an open network) and was assigned an IP. SSH=ing into this IP was successful. How can I fix my wlan0 interface? I do not want to rely on an external dongle. Connecting an ethernet cable and SSH-ing using the eth0 interface works as well.
I ended up reflashing my RaspberryPi with a fresh install
I've tried every adapter settings to be able connect internet through VM, but VM seems it can't connect in bridged mode and also NAT mode.
I tried to run couple of commands such as
service networking down
service networking start
ifconfig eth0 down
ifconfig eth0 up
None of them seems working.
Please tell me what I should do
Thanks
You might delete or disable one of VMware services. You can open services.msc via Run to search vmware services.
Please go Edit > Virtual Network Editor on your VMware
You need to get administrator previleges to Restore Defaults first
click on Change Settings button.
Click on Restore Defaults and wait for it finish
I have Windows 10 as host with a Manjaro installation as Guest on Virtualbox.
I have set a Debian server on another house with ssh installed. I have setup a dyndns on Debian's network so I can access it remotely.
For example..
From address 12.34.56.78 I ssh to foo.dyndns.org:1234. This port redirects me to 192.168.1.5:22 always as this is my Debian machine and the connection is established. I am able to do this from Windows 10 as well as my android and any other device in 12.34.56.78 or by 3G.
But..
When I try to do this
$ ssh foo.dyndns.org:1234
from the Manjaro Guest in Virtualbox I get the following error:
ssh: Could not resolve hostname foo.dyndns.org:1234: Name or service not known
So I did ifconfig and I saw my inet address was 10.0.2.15. I changed virtualbox's network adapter from NAT to Bridged so I can get a lan ip and I got the host's ip, 192.168.2.4. So I gave it another try and still didn't work.
Also, if i try to connect from vm to server while I'm in the same network
$ ssh user#192.168.2.5:22
it works. In this case virtualbox's network adapter was NAT.
This command works if I try from my android (connectbot).
I can connect the same way from PuTTY from Windows.
So my questions are:
Can it be done?
If so, how? (and why?)
Can a VBox Guest get lan ip that's not the same as the host's?
Is there any more information I should provide?
I have searched for a couple of days in here and on google and all I found where solutions on how someone can ssh INTO a vm. No one (from what I saw) asked the opposite.
Checking manual page for ssh reveals the format of command-line options:
ssh [...] [-p port] [...] [user#]hostnamessh
This simply describes, that you need to change
ssh foo.dyndns.org:1234
to
ssh -p 1234 foo.dyndns.org
if the domain resolves correctly to the ip address.
My last update on Fedora 22 Workstation simply broke my OS, it won't log in, crashing before it.
I want to download and install some new files to fix it. I'm plugging ethernet cable, but I can't connect to Internet.
In Gnome it's like wifi, just clicking on Enable or something like that
How can I enable ethernet connection in CLI mode (ctrl+alt+f2)?
The up flag with interface name (eth0) enables a network interface. For example, the following command will activates the eth0 network interface.
sudo ip link set eth0 up