Tech notes on the go: April 2015

cd $JAVA_HOME/bin

fix alternatives - use as root or append sudo

for i in `ls`; do update-alternatives --install "/usr/bin/$i" "$i" "`pwd`/$i" 1; done;

Find files and tar them

/note to myself

Finding files with most powerful utility find sending them to tarball

  find . -maxdepth 2 -type f -print0 | tar -czvf backup.tar.gz --null -T -

It will:

deal with files with spaces, newlines, leading dashes, and other funniness
handle an unlimited number of files
won't repeatedly overwrite your backup.tar.gz like using tar -c with xargs will do when you have a large number of files

source here

chrome dev tools truncate text in console

Things can get long.

For example location.href.

To copy looong location.href to clipboard with chrome dev tools use

copy(location.href)

Start Google Chrome on Android Emulator

Prepare Android emulator

Use Android emulator with enabled GPU - start emulator with -gpu on
Use larger system and data partition - start emulator with -partition-size 1024

Get a binary of Chrome - I use apk from http://www.apkmirror.com/apk/google-inc/chrome/

adb install com.android.chrome...apk

For web test automation one can use appium bundled with chromedriver, as well as chromedriver solely.