How can I edit the welcome message when ssh start?
By default, /etc/motd is a link to /var/run/motd which gets reset every time you login. To make permanent changes you need to remove the link first then change…
Disable .MobileBackup on Lion
Did you suddenly find no more space on your mac? Did you discover that .MobileBackup is taking a lot of space? I usually use an external drive to…
Toggling between Java 6 and Java 7 on mac
Raise an hand who does not have two versions of Java installed on your computer namely Java 6 as distributed by Apple and Java 7 as distributed by…
Find text including subdirectories in ubuntu
grep -rl "string" /path find . -name "*.jar" | xargs grep Topic locate try.txt | xargs grep hello The methods serve different purposes. recursive search and replace old…
Custom delay time and animation speed
Custom delay time You may have noticed that there is a short delay before the Dock appears when your mouse hits the edge of the screen. There is…
Install the JDK on Ubuntu server
Install the JDK Download he 32bit or 64bit Linux “compressed binary file” – it has a “.tar.gz” file extension i.e. “[java-version]-i586.tar.gz” for 32bit and “[java-version]-x64.tar.gz” for 64bit Uncompress…
Copy files with progress bar on terminal
rsync -avP source dest
Decrypt file encrypted with old/primary master key
Now, what if you need to decrypt a file that has been encrypted for your old master key, or you have create a subkey, moved away the primary…
How to remove the private master key from your laptop.
These instructions assume you use one computer, and keep the master keys on an encrypted USB flash drive, or preferably at least two (you should keep backups of…
A general Varnish health check.
From Varnsih documentation it is quite clear that Varnishstat gives a good representation of the general health of Varnish, including cache hit rate, uptime, number of failed backend…