The correct way of implementing SSL on localhost
Could anyone suggest a modern way of generating self-signed certificates to be implemented on localhost, which would be accepted by Chrome and Mozilla?
Unix & Linux
Restart USB mouse driver?
Sometimes, after some event that I can’t determine, my USB mouse gets stuttery – like the refresh rate drops down to about 5-10Hz. It still works fine other than that, but it’s incredibly annoying, and makes the computer feel really slow. It appears to happen frequently after a sleep, but it sometimes happens when the computer has just booted up. A reboot usually fixes it.
Why do some commands ‘hang’ the terminal until they’ve finished?
Sometimes you run a program from the terminal, say, lxpanel†. The terminal won’t drop you back to the prompt, it’ll hang. You can press Ctrl+C to get back to the prompt, but that will kill lxpanel. However, pressing Alt+F2 (which pops up a window to take a command) and running lxpanel works gracefully.
Dynamically reformatting man pages on terminal dimension changes
One common workflow of mine is to open a manual page in a terminal, then another terminal in which to test things. The man page is formatted to the initial dimensions of the first terminal. When I now resize my windows (or have my WM do that for me automatically), there is either a gap to the right of the preformatted page, or lines wrap. At this point I usually q(uit) and !! (run again), which loses my position in the page.
Find a file when you know its checksum?
I have the md5sum of a file and I don’t know where it is on my system. Is there any easy option of find to identify a file based on its md5? Or do I need to develop a small script ?
Is “Cached” memory de-facto free?
When running cat /proc/meminfo, you get these 3 values at the top:
Why doesn’t xsetwacom work from udev?
I made a script to rotate my Wacom Bamboo tablet 180 degrees. It works fine when I execute it as myself (user) or root, but when started from udev (i.e. when plugging the tablet into a usb port) it won’t work.
How to append a line in a zipped file without unzipping?
ADVANCED USAGE
Multiple compressed files can be concatenated. In this case, gunzip will extract all members at once. For example:
Regex alternation/or operator (foo|bar) in GNU or BSD Sed
I cannot seem to make it work. GNU sed documentation says to escape the pipe, but that doesn’t work, nor does using a straight pipe without the escape. Adding parens makes no difference.
How to extend logical & extended partition with fdisk
I’m trying to extend partition /dev/sda5 which is logical partition under extended partition /dev/sda2.