tmpfs

Extend SDcard lifespan with tmpfs which (mostly) will use RAM memory and not the regular filesystem.

You can use existing dirs in /run for this, or you can mount /tmp on tmpfs filesystem.

Mount directorys with heavy write load that do not contain information that need to survive reboot, add lines in fstab:

sudo nano /etc/fstab

Add the lines:

tmpfs	/tmp	tmpfs	defaults,noatime,nosuid,nodev,noexec,mode=1777,size=50M	0	0
tmpfs	/var/log	tmpfs	defaults,noatime,nosuid,mode=0755,size=50M	0	0

If you get error like this when doing update/upgrade:

Setting up ntp (1:4.2.6.p5+dfsg-2+deb7u1) ...
chown: cannot access `/var/log/ntpstats': No such file or directory
dpkg: error processing ntp (--configure):
 subprocess installed post-installation script returned error exit status 1

Since we vipe /var/log each boot there obviously are no directory like /var/log/ntpstats, but we can fix it with a cron command:

sudo crontab -e

Add the line:

@reboot mkdir /var/log/ntpstats > /dev/null 2>&1

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