gentoo | alsa sound | device not found
Check /etc/asound.conf Sometimes the sound cards change their sequence, modify the number. defaults.pcm.card 0 defaults.ctl.card 0 defaults.ctl.card 0 pcm.!default { type hw card 0 } ctl.!default { type hw card 0 }
docker | missing top and ps inside containers
Install ssh via Dockerfile.
Docker | cheat sheet for rookies
Containers are ‘Applications’ – they consists of images. Include so called Volumes to keep persistent data and exchange environment variables between containers. Dangled images are images included in still existing older versions of your container. Unused images are totally orphaned images. Avoid –link parameter – it’s deprecated. Use Volumes instead. Connecting volumes: -v Environment variables: […]
debian | get ip address of interface
# ip -f inet addr show INTERFACE | awk ‘/inet / {print $2}’
linux | get system idle via script
# XX=5;top -n $XX | grep CPU | grep id | awk ‘{print $8}’ | awk ‘{s+=$1} END {print s}’ | xargs -I % echo “scale=0;%/$XX” | bc -l
OpenBSD | script | get cpu idle | get net load
# systat -d 2 cpu 5 | tail -n 1 | grep ‘%’ | awk ‘{print $6}’| sed ‘s|%||’ # systat -d 2 ifstat 1
