lddcheck — Finds programs on system with missing library dependencies.


lddcheck [ -r FILENAME | --recurse FILENAME ] [ -l FILENAME | --log-file FILENAME ] [ -m FILENAME | --missing-file FILENAME ] [ -s [true]|false | --sort [true]|false ] [ -p [true]|false | --plain [true]|false ] [ --strip [true]|false ] [ -h [true]|false | --help [true]|false ] [ -H [true]|false | --help-long [true]|false ] [ -v [true]|false | --verbose [true]|false ] [ --version [true]|false ]


The lddcheck is used to track down missing shared libraries that are required by programs (or other libraries). This can be quite useful when preparing a bootable ISO image which is a subset of a full package install.

If you invoke this program without any command line arguments, it will search your ENTIRE file system. You can use various command line options to reduce the amount of the search.

Don't worry if the output from lddcheck scrolls by too quickly. Details for the files with missing libraries will be found in lddcheck.log and lddcheck.missing.

It should be noted that lddcheck will NOT detect missing libraries if the application dynamically loads them at run time (instead of being link with them at compile time). However, most programs don't fall into this category.

One can define a custom LD_LIBRARY_PATH in the /etc/lddcheck.conf configuration file. This allows one to add directories to the library search path that are not normally searched by the ldd command. The following example adds many directories containing shared libraries from the Java run time environment:

# lddcheck configuration file
# This file is sourced by the lddcheck utility each time it is run. Its
# purpose is to build a custom LD_LIBRARY_PATH with directories that are
# not in the standard path search by the ldd utility.

export LD_LIBRARY_PATH="";

# Add directories containing libraries used by the Java run time environment

for d in lib lib/server lib/i386 lib/i386/client lib/i386/xawt; do


The following command line options are available:

[-r FILENAME] | [--recurse FILENAME]

This command line option allows one to specify what directory to start searching for executable programs and libraries. We will run each executable through ldd and see if ldd reports "not found" for any of the required libraries. If this option is omitted, we will start our search from the root directory (/).

[-l FILENAME] | [--log-file FILENAME]

Each time that lddcheck detects that a required shared library is missing, it will log the name of the application/library which requires it along with the output of ldd to this log file. If this command line option is omitted, the output will be written to lddcheck.log in the current working directory.

[-m FILENAME] | [--missing-file FILENAME]

Once the lddcheck command finishes, it will report the list of required shared libraries that were not found in this log file. This will be a much smaller log file to review than lddcheck.log. If this command line option is omitted, the output will be written to lddcheck.missing in the current working directory.

[-s [true]|false] | [--sort [true]|false]

By default, the lddcheck command processes each file as reported by find. If you set this option to true, we will run the output of find through sort prior to processing. NOTE: Setting this option to true will cause a LONG delay before any output appears.

[-p [true]|false] | [--plain [true]|false]

By default, the lddcheck utility will insert escape codes in the standard output (to add color and spacing). This can be undesirable if you want to redirect the output to a file which you want to browse later. If this option is set to true, lddcheck will refrain from inserting escape codes into the output.

[--strip [true]|false]

BE CAREFUL! If you set this option to true, this may MODIFY files on your system. The strip command will be run on EVERY file which is found to be stripable (as reported by file).

[-h [true]|false] | [--help [true]|false]

When this option is specified, lddcheck will display a short one line description of lddcheck, followed by a short description of each of the supported command line options. After displaying this information lddcheck will terminate.

[-H [true]|false] | [--help-long [true]|false]

This option will attempt to pull up additional lddcheck documentation within a text based web browser. You can force which browser we use setting the environment variable TEXTBROWSER, otherwise, we will search for some common ones.

[-v [true]|false] | [--verbose [true]|false]

When you set this option to true, lddcheck will produce additional output. This is typically used for diagnostic purposes to help track down when things go wrong.

[--version [true]|false]

If this option is specified, the version number of the script is displayed.



If this file is present, it will be sourced. The primary purpose for this file is to allow one to construct and export a custom LD_LIBRARY_PATH such that the ldd utility will be able to resolve some of the more obscure libraries (like those found in the Java run time environment).


This file is generated each time you run the program and contains details about which programs had missing shared libraries and some summary statistics.


This file contains a simple list of the libraries that were missing.

See Also

ldd(1), ldconfig(8)