What is Sudo Ldconfig?

What is ldconfig. ldconfig is a program that is used to maintain the shared library cache. This cache is typically stored in the file /etc/ld.so.cache and is used by the system to map a shared library name to the location of the corresponding shared library file.

What does LDD command do?

ldd (List Dynamic Dependencies) is a *nix utility that prints the shared libraries required by each program or shared library specified on the command line. It was developed by Roland McGrath and Ulrich Drepper. If some shared library is missing for any program, that program won’t come up.

What is Ld so cache?

From the cache file /etc/ld. so. cache, which contains a compiled list of candidate shared objects previously found in the augmented library path. If, however, the binary was linked with the -z nodeflib linker option, shared objects in the default paths are skipped.

What is Linux gate so?

linux-gate.so.1 is nothing but the Linux Virtual Dynamic Shared Object. This file only exists in each executables address space. In other words you don’t have to copy or worry about this file as it is a virtual library.

What does strace do in Linux?

strace is a diagnostic, debugging and instructional userspace utility for Linux. It is used to monitor and tamper with interactions between processes and the Linux kernel, which include system calls, signal deliveries, and changes of process state.

What is ETC Ld so cache?

How does Ld-linux so work?

ld.so does an actual open and mmap of all needed ELF files, both ELF file of your program and ELF files of all neeeded libraries. Also, it fills GOT and PLT tables and does relocations resolving (it writes addresses of functions from libraries to call sites, in many cases with indirect calls).

What is ldconfig in Linux?

ldconfig is used to create, udpate and remove symbolic links for the current shared libraries based on the lib directories present in the /etc/ld.so.conf 3 ldconfig Examples 1. Display current libraries from the cache

How does the ldconfig cache work?

The cache is used by the run-time linker, ld.so or ld-linux.so. ldconfig checks the header and filenames of the libraries it encounters when determining which versions should have their links updated. ldconfig will attempt to deduce the type of ELF libs (ie. libc5 or libc6/glibc) based on what C libs, if any, the library was linked against.

Why am I getting ldconfig -V error?

Sometimes when you do ldconfig -v, you might get the following error. This is because the directory referred by some of the *.conf file located under /etc/ld.so.conf.d is not valid, and contains directory names that doesn’t exist. Note: You can either ignore these error mesages are remove those *.conf files from the /etc/ld.so.conf.d directory.