After an upgrade, most of the programs reasonably stopped running or refuse to run with the message "/lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.17' not found", ls, apt-get, insmod, networking modules.....
so now I lost networking , it does not recognize usb sticks.
Am I right to assume that the only solution is to boot from USB and then overwrite the current version with a more recent one ?
EDIT : I use Ubuntu 14.04, the problem happened after apt-get upgrade, I don't know precisely from what version to what version the glibc was upgraded, probably from something to 2.17
I don't need a step by step guide, just directions.