HomeAboutImpressumBoosting Audio Output under Ubuntu LinuxI often had the problem when I wanted to watch a movie or listen to some audiofile and there was background noise I wanted to turn up the volume but it was already at 100% . I thought it should be possible to turn up the signal beyond 100% and decide by myself if the signal is clipping/distored. And there is a very easy solution for the people using pulseaudio.Just install the tool pamansudo apt-get install pamanNow you can boost the audio to 500% volume. For me usually 150% was enough ;).October 26th,2013Misc | No CommentsEncrypted off-site backup with ecryptfsI was looking for a method to backup my data encrypted. Of course there exist plenty of possibilities, but most of them either encrypt a container or complete partition or seemed to be complicated to setup. I did not want container or partition encryption as I fear if the media is corrupted or something goes wrong during network transfer perhaps all my data would be unaccessable for me. With file-based encryption I have almost the same risk as without encryption. Even if I loose some files to corruption I can still decipher the rest of the data.Finally I chose ecryptfs because it is a file-based encryption which also encrypts the filenames and it is very easy to setup and use. On the homepage it advertises itself as You may think of eCryptfs as a sort of “gnupg as a filesystem”. and that’s basically what I was looking for. It safes all meta information in the file, so you can recover it when you have the file itself and the encryption parameters (which are few and easy to backup).So lets get started. I ciphered a testfile on Ubuntu 12.04.1 and deciphered it successfully under Debian 7.0 .First you have to install the tools which is very easy using apt (the same on both Ubuntu and Debian):sudo apt-get install ecryptfs-utilsThen create a new directory, (which will be encrypted) and enter some parameters needed by ecryptfs:mount -t ecryptfs /home/ecrypttest/encrypted/ /home/ecrypttest/encrypted/Passphrase: Select cipher: 1) aes: blocksize = 16; min keysize = 16; max keysize = 32 (loaded)2) des3_ede: blocksize = 8; min keysize = 24; max keysize = 24 (not loaded)3) cast6: blocksize = 16; min keysize = 16; max keysize = 32 (not loaded)4) cast5: blocksize = 8; min keysize = 5; max keysize = 16 (not loaded)Selection [aes]: Select key bytes: 1) 162) 323) 24Selection [16]: Enable plaintext passthrough (y/n) [n]: nEnable filename encryption (y/n) [n]: yFilename Encryption Key (FNEK) Signature [9702fa8eae80f468]: Attempting to mount with the following options:ecryptfs_unlink_sigsecryptfs_fnek_sig=9702fa8eae80f468ecryptfs_key_bytes=16ecryptfs_cipher=aesecryptfs_sig=9702fa8eae80f468Mounted eCryptfsThe filename encryption key FNEK will be created for you and will be different from mine. Just copy & paste the parameters to a textfile. We will need it later for deciphering.now enter the directory, and create a test file:cd /ho