I have observed a change in behaviour in vim and tiny vim, in Debian 11 (Bullseye). When the window loses focus, vi automatically enters command mode.
To revert to the previous behaviour, where vi will retain the most recent mode, add the following to ~/.vimrc:
set esckeys
Sometimes it is necessary to speed up videos and/or reduce the resolution. This will typically result in a much small file size. ffmpeg and avconv allow video file manipulation on the command line.
These commands work on Debian 10, and will likely work on Ubuntu and other Linux distributions.
Speed up video, 2× speed: ffmpeg -i input.mp4 -filter:v "setpts=0.5*PTS" output.mp4
Reduce resolution down to 1280×720: ffmpeg -i input.mp4 -s 1280x720 output-small.mp4
Note that the metadata of the video, such as the resolution, can be read with the utility:
mediainfo
When developing on platforms with a different architecture and cross-compiling, it is often necessary to print the stack trace on a coredump.
TOOLCHAIN=/path/to/toolchain
DEBUGER=$TOOLCHAIN/gdb
EXECUTABLE=myprogram
CORE=coredumpfile
$DEBUGER -ex “set sysroot $TOOLCHAIN” -ex “set auto-load safe-path $TOOLCHAIN” -ex "file $EXECUTABLE" -ex "core-file CORE" -ex "thread apply all bt full" -ex "quit" > trace.log
Debian Stretch
Using the following steps an Android phone can be mounted over USB by a Debian Linux system.
At this point, my phone prompts me whether or not to allow this connection. I select allow, but it is too late for the computer and any attempts to browse the directory /mnt/phone result in i/o errors. Unmounting and remounting without changing anything on the phone and leaving it connected, is a work-around for this issue.
Do work.
Newer versions of vi/vim included with Debian Stretch and later have the mouse mode enabled, which prevents traditional copy and paste from being used – the ability to highlight text and then middle-click to paste.
To re-enable this behaviour so that the middle-click can be used, enter the following line into your ~/.vimrc file:
set mouse=r