Someone

Another copy of the C library was found via /etc/ld.so.conf.
It is not safe to upgrade the C library in this situation;
please remove the directory from /etc/ld.so.conf and try again.
dpkg: error processing /var/cache/apt/archives/libc6_2.5-5_i386.deb (--unpack):
 subprocess pre-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/libc6_2.5-5_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
RESULT=100