Documentation of glibc is also available in the glibc manual, available via the command info libc. (There were earlier 0.x releases.) The next major release of glibc was 2.0, at the beginning of 1997.
The pathname /lib/6 (or something similar) is normally a sym‐ bolic link that points to the location of the glibc library, and exe‐ cuting this pathname will cause glibc to display various information about the version installed on your system.
However, notwithstanding the original motivations of the Linux libc effort, by the time glibc 2.0 was released (in 1997), it was clearly superior to Linux libc, and all major Linux distributions that had been using Linux libc soon switched back to glibc.
To avoid any con‐ fusion with Linux libc versions, glibc 2.0 and later used the shared library soname 6.
You will jave to reinstall it and restore the data from backup.
The term "libc" is commonly used as a shorthand for the "standard C library", a library of standard functions that can be used by all C programs (and sometimes by programs in other languages).
This can be locked or deleted or whatever is the convention here. Will updating libc to 2.15 in this manner fix Popcorn Time? I don't know whether this is compatible with Kali Linux.2. This could mean that the 1 from Popcorn Time is too old, which would be very strange.