Josh's questions -server

Josh

Asked: 2011-12-30 18:12:42 +0800 CST

Do I need to zero-fill a qcow2 image before compacting it?

I want to recreate a dynamically allocated qcow2 image in order to shrink it. Is it sufficient that all unnecessary files have been deleted, or do I also need to fill the space formerly occupied by those files with zeros? In other words, is qemu-img filesystem-aware?

Do I need to zero-fill a qcow2 image before compacting it?

Can you pass user/pass for HTTP Basic Authentication in URL parameters?

Ping a Specific Port

Check if port is open or closed on a Linux server?

How to automate SSH login with password?

How do I tell Git for Windows where to find my private RSA key?

What's the default superuser username/password for postgres after a new install?

What port does SFTP use?

Command line to list users in a Windows Active Directory group?

What is a Pem file and how does it differ from other OpenSSL Generated Key File Formats?

How to determine if a bash variable is empty?