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(Updated 29.5.2011 for version 1.11) Compiling the binaries :::::::::::::::::::::: This source package contains the required sources for vnStat including the daemon (vnstatd) and image output (vnstati). Executing make will compile 'vnstat' and 'vnstatd' without requiring additional libraries. The optional image output however requires libgd2 to be available. The required extra packages are usually named libgd2 and libgd2-dev (or libgd2-noxpm and libgd2-noxpm-dev in Debian/Ubuntu, xpm version can also be used). Executing make all will compile everything including the image output support. An example cgi ('vnstat.cgi') to be used with http server with the image output support has been provided in the 'examples' directory. Configuration options for the cgi are in the beginning of the file. Installing as root :::::::::::::::::: Login as root and run the following command: make install If there were no errors, vnStat binaries, man pages and a config file should now be installed. Next the used kernel should be checked that it is able to provide static information about the system boot time. vnstat --testkernel The only way to fix a faulty kernel (afaik) is to compile/install a newer one. Next every interface that should be monitored needs to be introduced to vnStat. Replace 'eth0' in the command with any available interface if needed. vnstat -u -i eth0 Repeat that for every other interface you wish to use. If you are unsure of available interface names then run vnstat --iflist and select a suitable looking interface from the provided list. Usually 'lo' isn't the one you are looking for. The configuration file /etc/vnstat.conf should also be checked at this point. See the vnstat.conf man page for documentation about available options. Finally make vnStat monitor the selected interface(s). There are two way for updating interface data, daemon and cron. It is suggested to use daemon based updating because it generated less disk access and is more accurate especially when monitoring interfaces that aren't always available. Select ONLY ONE of these two: 1) daemon based updating :::::::::::::::::::::::: Configure init scripts so that the following command is executed once during system start: vnstatd -d The examples/init.d directory contains suitable init.d scripts for some commonly used distributions. An alternative option is to just add the command to an already existing script that gets executed during startup. In many distributions /etc/rc.local can be used for that. 2) cron based updating :::::::::::::::::::::: Copy the example cron file to /etc/cron.d cp examples/vnstat.cron /etc/cron.d/vnstat and edit the cron file if the default 5 minute update interval is too long. See the vnStat man page 'restrictions' section for limitations regarding fast interfaces and 32 bit interface traffic counters. Devices like ppp0 also require vnStat enable and disable commands to be added to suitable script file when cron based updating is used. Example scripts can be found in the 'examples' directory. Installing without root access :::::::::::::::::::::::::::::: Copy all needed binaries to some directory included in your $PATH (~/bin/ is an example) and make the database directory. cp src/vnstat src/vnstatd src/vnstati ~/bin/ cp cfg/vnstat.conf ~/.vnstatrc mkdir ~/.vnstat During version 1.0 it became clear that some kernels are broken and don't provide to correct boot time for the system. vnStat requires this information so there's a test to see if the kernel is working correctly. vnstat --testkernel If this gives 'command not found' then check your $PATH. The only way to fix a faulty kernel (afaik) is to compile/install a newer one. This can't be done without the root account so you'll have to solve this problem with your sysadmin if the kernel is broken. Now open the config file ~/.vnstatrc with your favorite text editor and locate the following line: DatabaseDir "/var/lib/vnstat" and replace it with DatabaseDir "/pathtomyhomedir/.vnstat" and save the file. If you are unsure about you homedir path execute cd ; pwd The ouput should tell your homedir. Next every interface that should be monitored needs to be introduced to vnStat. Replace 'eth0' in the command with any available interface if needed. vnstat -u -i eth0 Repeat that for every other interface you wish to use. Now it's time to add a crontab entry for vnStat. Do that by executing the command 'crontab -e' and add the following line (without leading spaces, remember to change the path): */5 * * * * ~/bin/vnstat -u OR if the daemon can be used @reboot ~/bin/vnstatd -d If you found yourself using a strange editor then 'man vi' should help. If you choose to use the daemon then make sure the configuration file (~/.vnstatrc) has the log option either disabled or set to a file that is located in a place where you have write permissions, such as your home dir. Then (if using the daemon) try starting it with 'vnstat -d'. After that wait for (or generate) at least 1024 bytes of network traffic (and 5 min for the next cron/daemon update). vnstat Now you should get some stats about your network usage. See the config file ~/.vnstatrc for interface and other settings.