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Archive of posts filed under the tips category.

File encryption on the command line

This list is just a reference which hopefully saves some googling. Let's make it clear that we're talking about symmetric encryption here, that is, a password (or better, a passphrase) is supplied when the file is encrypted, and the same password can be used to decrypt it. No public/private key stuff or other preparation should […]

Port mirroring with Linux bridges

Port mirroring with the most popular Linux bridge implementations.

Poor man’s directory tree replication

Bulk replication of directory trees.

Many ways to encrypt passwords

TMTOWTDI, even for password hashing.

Some notes on macvlan/macvtap

Just a summary of sparse information about poorly documented features.