/usr/share/php/Composer/Command/ is in composer 1.0.0~beta2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Composer/Command/AboutCommand.php
/usr/share/php/Composer/Command/ArchiveCommand.php
/usr/share/php/Composer/Command/BaseCommand.php
/usr/share/php/Composer/Command/BaseDependencyCommand.php
/usr/share/php/Composer/Command/ClearCacheCommand.php
/usr/share/php/Composer/Command/ConfigCommand.php
/usr/share/php/Composer/Command/CreateProjectCommand.php
/usr/share/php/Composer/Command/DependsCommand.php
/usr/share/php/Composer/Command/DiagnoseCommand.php
/usr/share/php/Composer/Command/DumpAutoloadCommand.php
/usr/share/php/Composer/Command/ExecCommand.php
/usr/share/php/Composer/Command/GlobalCommand.php
/usr/share/php/Composer/Command/HomeCommand.php
/usr/share/php/Composer/Command/InitCommand.php
/usr/share/php/Composer/Command/InstallCommand.php
/usr/share/php/Composer/Command/LicensesCommand.php
/usr/share/php/Composer/Command/ProhibitsCommand.php
/usr/share/php/Composer/Command/RemoveCommand.php
/usr/share/php/Composer/Command/RequireCommand.php
/usr/share/php/Composer/Command/RunScriptCommand.php
/usr/share/php/Composer/Command/ScriptAliasCommand.php
/usr/share/php/Composer/Command/SearchCommand.php
/usr/share/php/Composer/Command/SelfUpdateCommand.php
/usr/share/php/Composer/Command/ShowCommand.php
/usr/share/php/Composer/Command/StatusCommand.php
/usr/share/php/Composer/Command/SuggestsCommand.php
/usr/share/php/Composer/Command/UpdateCommand.php
/usr/share/php/Composer/Command/ValidateCommand.php