Getting rid of a serial console on Respeaker Core V2
I have a Respeaker Core v2.0 and I would like to use the UART interface (this board has a USB to TTL adapter connected to the Uart port) in order to make this board communicate with another one.
Unix & Linux
The rc0.d,rc1.d,… directories in /etc
I’m running Ubuntu where I have the directories /etc/rc0.d, /etc/rc1.d, /etc/rc2.d, …, /etc/rc6.d.
What is a socket?
Could someone explain to me what a socket is? I see it in many acronyms in context of SSL, etc.
What is a “subreaper” process?
The word “subreaper” is used in some answers. Searching Google also turn up entries where the word is “just used”.
Which shell am I running on?
When I run echo $SHELL the output says /bin/tcsh which means that I am running a tcsh shell.
But for example when I issue the following command
Bash =~ regex and https://regex101.com/
Using https://regex101.com/ I built a regular expression to return the first occurrence of an IP address in a string.
bash iterate file list, except when empty
I thought this would be simple – but it is proving more complex than I expected.
How can I use Linux as a Gateway?
NOTE: If client devices (computer B in this example) want to obtain
internet through the gateway computer, maybe they still need to configure
nameserver resolution. This is not explained here (a gateway does not necessarily serve internet).
How to inspect systemd journal files directly?
I have arch linux failing on a device. The device doesn’t have any screen, it doesn’t respond to network. So I take its SD card, insert it in ubuntu desktop, see a fresh system.journal there and… How to see what is inside?
tmux bottom status bar color change
I recently started to use tmux and like it much, but its green bottom bar is a bit distracting, is there a way to change its color? or a way to hide it?