Moving ethereum to local linux wallet

/ Sven / Ubuntu

In the light of the massive surge in the price of Ethereum (ETH) in the last week I wondered if my online wallet provider was in fact buying the digital currency for me. I wasn’t sure, since betting on a burst of the bubble anytime soon could yield massive profits for these online trading platforms […]

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RSync Support on Zyxel nsa325-v2 NAS

/ Sven / NAS

Unfortunetly the Zyxel nsa325-v2 NAS doesn’t anymore support rsync capabilities out of the box. It can be reinstalled though (even on the latest firmware 4.80) with the help of the ffp package. To be able to use it I added a file called “web_prefix” containing the following line into the admin/zy-pkgs folder: ftp://ftp.zyxel-tech.de/ Afterwards I […]

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MongoDB: Too many open files under Ubuntu 15.04

/ Sven / MongoDB, Ubuntu

Lately I had troubles with MongoDB after my database exceeded 2TB and started to constantly complaining about “too many open files“. In order to fix this issue I appended the following lines to “/lib/systemd/system/mongodb.service”: [Service] # Other directives omitted # (file size) LimitFSIZE=infinity # (cpu time) LimitCPU=infinity # (virtual memory size) LimitAS=infinity # (open files) […]

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Decypher Salted OpenSSL Files with C++

/ Sven / C++

I like my encrypted files salty: Especially when stored in the cloud this add protection against rainbow table attacks. Usually I encrypt my files therefore with: openssl aes-256-cbc -salt infile -out outfile It took my quite a while to figure out how to open these files in C(++). The following lines show how to open […]

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Ubuntu 14.04 Swiss Keyboard Problem

/ Sven / Ubuntu

After updating to Ubuntu 14.04 I experienced some serious annoyances / problems with the keyboard layout. My swiss keyboard was always put back to the english layout. After a few unsuccessfull attempts I was able to manage the get it straight by changing the settings in the ibus panel. I just started a terminal, entered: […]

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Backing up Baikal via SSH

/ Sven / Raspberry Pi

Just a one-liner for backing up Baikal remotely: ssh -C {REMOTE_USER}@{REMOTE_ADRESS} ‘mysqldump –user={MYSQL_USER} –password={MYSQL_PASSWORD} {BAIKAL_MYSQL_DATABASE} | bzip2 -c’ > baikal-backup.sql.bz2 – Needless to say that you need to add the public key of your client to servers known_keys (see here).

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CalDav and CardDav Server on Raspberry Pi

/ Sven / Raspberry Pi

In my attempt to reduce my dependencies of external cloud providers of caldav/carddav (PIM) solutions I’ve been trying out a few different servers on my raspberry pi. Among the options I’d tried were CalendarServer from Apple, ownCloud, Radicale and Baïkal. OwnCloud was too heavy (since I use other services like privoxy and lighttpd), iCal too […]

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