How do mouse events work in linux?
This is mostly out of curiosity, I’m trying to understand how event handling works
on a low level, so please don’t reference me to a software that’ll do it for me.
Unix & Linux
Using ACL with Multiple Default Groups
I have looked though the answers to similar questions and refreshed my memory on ACLs by reading tutorials on Linux ACLs. Yet, I am still stumped. What have I done wrong, or what do I not understand?
Ubuntu shell does not show the current path
In my Ubuntu 12.04, the prompt always show the following only (no matter what path I’m in):
Bash script needed to run every second
I have a few cleanup commands to run for my datacaching scheme. I was thinking a bash script would be an easy way to check if the full clean up job needed to be run. But the cache is very time sensitive, so the check script needs to run every second. What’s the best way to do this?
How to copy files from the folder without the folder itself
I’m trying to copy files and subfolders from A folder without the A itself. For instance, A folder contains next:
Grep of many keywords over many files: speeding it up
I am currently facing a “performance problem” while using grep. I am trying to locate the occurrences of many (10,000+) keywords in many (think Linux kernel repository size) files.
The objective is to generate a kind of index for each keyword:
Set some firewall ports to only accept local network connections?
How do I set up the firewall on a system in a LAN so that some ports are only open to connections from the local area network, and not from the outside world?
File system compatible with all OSes?
I use Linux and Mac OS X on a regular basis, and sometimes I have to use Windows. I need to use a flash drive on all three, and I need a filesystem that will work well on all of them. None of the ext’s work on Mac or Windows, HFS+ doesn’t work on Windows (or well on Linux), NTFS is read-only on Mac, and FAT sucks on all OSes. Is there a file system that would work reasonably well on all operating systems? I’d like it to work without drivers or additional installations, so it can be used on any computer.
What is the difference between kill , pkill and killall?
I am familiar with kill command , and most of the time we just use kill -9 to kill a process forcefully, there are many other signals that can be used with kill. But I wonder what are the use cases of pkill and killall, if there is already a kill command.
systemctl does not restart the service until ssh to the AWS instance
I am hosting a bitcoind on my AWS EC2 instace and I have made it as a user service using the following service file: