I know this is a basic thing, but I can't for the life of me figure it out.. what was the name of the Linux command that takes the name of a shared library as the argument and lists all the libraries that it depends upon? I googled for it, but I couldn't find the right answer.

Thanks!
Dai

ldd

Thanks a million! Exactly what I needed.

some depends idiot just uploaded this. i'm sure it shows things LDD doesn't but it's not well tested yet. a small bit of output is shown below. it comparable to ldd but features are very different.

http://sourceforge.net/p/dep-trace/

http://sourceforge.net/projects/dep-trace/files/libdeps

should show total dependancy table of what ldconfig(1) will load (or has already loaded) and show which libs are NOT_FOUND (ie, no version or file) and then also what is effected.

try it, enjoy. it's very new so don't say i didn't tell you. it did just find some things below i didn't know about my lib system - i'm just about to go fix that.
libdeps objdump -h

(dep-trace is needed, depsort script too, are the the URL ^^. libdeps uses objdump(1) -> dt -> makes a table of each and all deps+rdeps, formats/markup, shows - quickly)

Experimental - see help libdeps [objdump | ldd] [-l | file] -l use find *.so is used on ldconfig dirs file one file.so per line snip...
libdeps objdump -d

LIBTABLE

ld-linux.so.2(file)

ld-linux.so.2(GLIBC_2.0)(file)

ld-linux.so.2(GLIBC_2.1)(file)

ld-linux.so.2(GLIBC_2.0)(file)

ld-linux.so.2(GLIBC_2.3)(file)

ld-linux.so.2(GLIBC_2.1)(file)

ld-linux.so.2(GLIBC_PRIVATE)(file)

ld-linux.so.2(GLIBC_2.3)(file)

libBrokenLocale.so.1(file)

snip ...

libc.so.6 libc.so.6(file) ld-linux.so.2 ld-linux.so.2(GLIBC_2.0) ld-linux.so.2(GLIBC_2.1) ld-linux.so.2(GLIBC_PRIVATE)

snip ...

libanl.so.1 libanl.so.1(file) ld-linux.so.2 ld-linux.so.2(GLIBC_2.0) ld-linux.so.2(GLIBC_2.1) ld-linux.so.2(GLIBC_PRIVATE) libc.so.6(GLIBC_2.1.3) libc.so.6(GLIBC_2.0) libc.so.6 libc.so.6(GLIBC_2.1) libc.so.6(GLIBC_2.3) libc.so.6(GLIBC_2.2) libc.so.6(GLIBC_PRIVATE) libc.so.6(GLIBC_2.3.2) libc.so.6(GLIBC_2.1.2) libpthread.so.0(GLIBC_2.1) libpthread.so.0

libnss_db.so.2 libnss_db.so.2(file) ld-linux.so.2 ld-linux.so.2(GLIBC_2.0) ld-linux.so.2(GLIBC_2.1) ld-linux.so.2(GLIBC_PRIVATE) libc.so.6(GLIBC_2.1.3) libc.so.6(GLIBC_2.0) libc.so.6 libc.so.6(GLIBC_2.1) libc.so.6(GLIBC_2.3) libc.so.6(GLIBC_2.2) libc.so.6(GLIBC_PRIVATE) libnss_files.so.2 libnss_files.so.2(GLIBC_PRIVATE) libdb3.so.3(NOT_FOUND) libdb3.so.3(DB3_2)(NOT_FOUND)

snip...

NOT_FOUND libctutils.so.0

libdb3.so.3

libdb3.so.3(DB3_2)

EFFECTED libctutils.so.0 libconsole.so.0

libdb3.so.3 libnss_db.so.2

libdb3.so.3(DB3_2) libnss_db.so.2

libconsole.so.0

libnss_db.so.2

12/04/14 21:56 -0500 Thursday, December 04, 2014, 09:56:35 PM EST

the runtime of the above on (find /lib/ -type f -maxdepth 1) (to dep-trace, make and store tables including rdeps, plus markup output on stdout was:

0.2 sec , on a 1.6 GHz cpu

on Debian linux, all files installed by wonderful pkg-depends knowing dpkg(1) keeps list of all installed files in /var/lib/dpkg/info/pkgnames.list

one can use (awk) to check that ONLY LIBS dpg installed are in libs dirs. anything else and ldconfig(1) may use it instead - and anything dpkg(1) didn't install might not be complete (may have missing lib files not on system)

(or not at least not on the path /etc/ld.so.conf or LD_LIBRARY_PATH)

(if you use the bash env you can change the order and sight of which libs ld.so loads: you can test libs by putting a set in an experimental directory and applying LD_LIBRARY_PATH to just that shell - that way if the lib set is broken: you only loose one terminal and do not need a rescue disk !!)

You have responded to a 10 year old thread... necro-posting is usually discouraged, maybe consider opening a new thread if you have something new to post.