Sometimes it is necessary to speed up videos and/or reduce the resolution. This will typically result in a much smaller file size. ffmpeg and avconv allow video file manipulation on the command line.
These commands work on Debian, and will likely work on Ubuntu and other Linux distributions.
It’s a few simple steps to create GPG encryption keys and use these for signing and encrypting files and emails.
Create a new pair of public/private cryptographic keys:
user@yourhost:~$ gpg --gen-key
…
follow the prompts use the defaults if unsure…
A hard disk image may be taken using 'dd' or a similar too. This image can be used for later analysis or recovery.
The image exists as a single file: image.img
# fdisk -lu image.img
Disk image.img: 953.87 GiB, 1024209543168 byt…
IPv6 auto configuration on Linux will normally assign the same address every time when connecting to a specific network. This address would normally be formed from the network prefix and local interface MAC address. When using IPv4 your identity is slightly masqued by NAT. Although your single public IP address may be tracked, it is
WPA and WPA2 provide good WiFi security which is mainly susceptible to brute force attacks. Here is how such a brute force attack may be carried out.Using Debian and an Intel Corporation Centrino Wireless-N 1000 card:
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