How to downgrade Java.
In short: Uninstall Java plugin (Java Web Start) for your browser type: sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin To remove a specific Java version go to: /Library/Java/JavaVirtualMachines/ and remove…
Remove and Disable Spotlight icon from top right bar
Hide: sudo chmod 600 /System/Library/CoreServices/Search.bundle/Contents/MacOS/Search killall SystemUIServer Show it again: sudo chmod 755 /System/Library/CoreServices/Search.bundle/Contents/MacOS/Search killall SystemUIServer To disable spotlight only instead, without removing it from the top menu:…
Warm up a server (populate cache)
If you need to start a server, you might want to populate it first with some content, before putting it live to the public wget –no-directories –recursive –level…
Delete all files in a folder which don’t match file extensions
find . -type f ! -name "*.jpg" ! -name "*.JPG" -delete
How do I uninstall Java for my Mac?
Uninstalling Oracle Java (current version) involves deleting the Java Plugin file JavaAppletPlugin.plugin. Open your Terminal, copy and paste the following line: sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin If you…
How to add route on Mac
Let’s assume the IP 10.67.0.0 is only accessible through the VPN 192.168.120.254, then you can use route command to access your destination IP through the Gataway. To view…
Check space in a disk
du -cs * .[^\.]* | sort -n du / |sort -n
wget – how to mirror only a section of a website
wget –mirror –page-requisites –adjust-extension –no-parent –convert-links –directory-prefix=sousers http://stackoverflow.com/users
Move files older than 30 days in current folder to
find . -mtime +30 -exec mv {} old/ \;
How to generate a secure random password
I believe 50 char are good enough. head -c90 /dev/urandom | base64 | sed s/[^a-zA-Z0-9]//g | head -n 1 | cut -c 1-50