benzimmer

Infopark&Friends Ruby Beginners Workshop

$> irb

Alles ist ein Objekt

Um in Ruby Dinge zu tun versetzt man sich in die Lage eines Objektes. Um herauszufinden welches Objekt man gerade ist benutzt man self

self

benzimmer

### Keybase proof

I hereby claim:

  * I am benzimmer on github.
  * I am benzimmer (https://keybase.io/benzimmer) on keybase.
  * I have a public key whose fingerprint is 633B 78E8 76FB 1CBF B7A3  6388 796D FEFF D4D2 519C

To claim this, I am signing this object:

benzimmer

$ tmux attach
protocol version mismatch (client 7, server 6)
$ pgrep tmux
3429
$ /proc/3429/exe attach

benzimmer

.video-wrapper {
	position: relative;
	padding-bottom: 56.25%; /* 16:9 */
	padding-top: 25px;
	height: 0;
}

.video-wrapper iframe {
	position: absolute;
	top: 0;

benzimmer

git checkout --orphan newbranch
git rm -rf .
<do work>
git add your files
git commit -m 'Initial commit'

benzimmer

# Show memory usage of all docker containers
$ for line in `docker ps | awk '{print $1}' | grep -v CONTAINER`; do docker ps | grep $line | awk '{printf $NF" "}' && echo $(( `cat /sys/fs/cgroup/memory/docker/$line*/memory.usage_in_bytes` / 1024 / 1024 ))MB ; done

# Remove non-running Docker containers
$ docker rm `(docker ps -q && docker ps -qa) | sort | uniq -u`

benzimmer

# Remove point in time backups from timemachine
# First mount timemachine volume (for example open Time Machine.app)
sudo tmutil delete /Volumes/Time Machine Backups/Backups.backupdb/$(MACHINE_NAME)/$(DATE)

# If you have your backups stored in a sparsebundle you can reclaim the freed space with this:
sudo hdiutil compact $(DISK_IMAGE_PATH)
# Use this if you are on battery and receive a odd warning from the command above ;)
sudo hdiutil compact $(DISK_IMAGE_PATH) -batteryallowed