Category Archives: raspberry pi

raspberry pi

Logging to persistent tmpfs on Raspbian “jessie”

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At the end of Using a Raspberry Pi 2 Model B as a router/firewall for the home LAN I wrote that I decided not to put /var/log into tmpfs, because:

  1. I wanted the logs to be persistent
  2. I thought that the wear would result in less and less of the sd card to become available (and 16GB for logs should last a loong time)

As it turned out the sd card died after one month.

I don’t know if the cause was excessive logging, the use of ntopng (which did write quite a lot, both in the number of files, the number of files, and in the total storage used, which was approximately 0,5GB after 30 days of uptime) or simply a bad sd card.

However, going forward with a new sd card, I’ve done the following:

  1. Removed ntopng
  2. Put /var/log on tmpfs (limited to 100MB in size), synced to a backing store on the sd card using rsync

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raspberry pi

Using a Raspberry Pi 2 Model B as a router/firewall for the home LAN

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Since 1999 I have been using a 1996 vintage DEC PII desktop as the router/firewall between the internet and my home network.  The DEC computer came to me with Win95 (or possibly Win98) in 1998, got SuSE linux and started its mission as router and firewall (and CUPS server, and IMAP server, and various other server stuff). When upgrading the SuSE installation to a newer version went south, it spent a while running ThomasEz’s floppyfw, until I used a floppy net install to install debian potato, immediately switched it to debian testing, until debian woody arrived, when it was moved to debian stable, and then I just kept running “apt-get dist-upgrade” until I finally had it running debian 8 “jessie” on june 6 in 2015.

The old DEC desktop has survived its maker company, survived lightning strikes that have sent the power supplies and/or main boards of other computers on the same LAN into continously beeping mode (i.e. broken). However, in December 2015 it started acting up, and crashing with irregular intervals (sometimes two weeks, sometimes one day).

So… the time for a replacement would have to be not too far ahead. The question was what to replace it with?
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