Command not found

Typical libc6-dev missing, example:

$ sudo invoke-rc.d varnish start
Starting HTTPd accelerator: /usr/bin/ld: crti.o: No such file: No such file or directory
collect2: ld returned 1 exit status
pclose=256
Internal error: GCC returned 0×0100
invoke-rc.d: initscript varnish, action “start” failed.

Solution:

$ sudo apt-get install libc6-dev