The ssh-add utility (see SSH agent for details) accepts a program in the environment variable SSH_ASKPASS that retrieves a passphrase from the user. This is especially useful to use the SSH agent from a script or a GUI (i.e. without a console).
The following list will provide some hints how to configure you SSH daemon although most options will not have to be modified as they also contain reasonable defaults.
The following code forms the typical header for my Perl scripts:
It is possible to control the SSH client while being logged in to a server:
The SSH agent stores unencrypted private keys to help you log in to servers without supplying your private key’s passphrase during retries.
To regenerate your public key from the private key:
When a variable is passed by value, Perl does not create a copy of the contents to build @_ but, rather, creates an alias to the contents of the original variable. Therefore, a memory blow-up is caused by reading from @_.
The crosscompiling hint is now maintained by Ted Bullock.
For a series of measurements $x_i = x_1, \dots, x_n$, it is useful to examine the magnitude of a certain fraction of the number of values.