Windows regsvr32 (register DLL) equivalent in Linux
Updates the dynamic linker cache after installing new shared libraries (.so files) — the Linux equivalent of registering a DLL.
regsvr32 (register DLL)
sudo ldconfig
sudo ldconfig
sudo ldconfig
Overview
What this command does
On Windows, "regsvr32 (register DLL)" is used to update shared library cache. On Linux, the closest practical mapping shown here is "sudo ldconfig". Updates the dynamic linker cache after installing new shared libraries (.so files) — the Linux equivalent of registering a DLL. This reference is grouped under System & Storage → System.
Windows → Linux context
What changes when you use this on Linux?
Equivalent task, different tool
Windows regsvr32 (register DLL) maps to sudo ldconfig for this task. Treat this as a workflow mapping rather than a character-for-character syntax translation.
Portable across the compared distros
The Debian/Ubuntu, Fedora and Arch rows use the same command in this mapping. Package availability or defaults can still vary, so check the installed tool version when an option behaves differently.
Elevated privilege appears in this workflow
At least one example uses sudo. Confirm the target path, device, service or package before running the elevated form; do not add sudo simply to bypass an unexplained permission error.
For the broader concept behind this mapping, read Linux disks, storage and mounts.
Practical tasks
Common use cases
Update shared library cache
Updates the dynamic linker cache after installing new shared libraries (.so files) — the Linux equivalent of registering a DLL.
sudo ldconfig
Rebuild library cache
ldconfig -p
Print all cached libraries
ldconfig -p | grep libname
Check if a library is registered
Ready to run
Copyable Linux commands
Review paths, device names, package names and permissions before running any command.
sudo cp mylib.so /usr/local/lib/
sudo ldconfig
ldconfig -p | grep mylib
ldd /usr/bin/python3
Walkthrough
Examples with explanations
# Windows: regsvr32 mylib.dll
# After installing a .so library manually:
sudo cp mylib.so /usr/local/lib/
sudo ldconfig # update the cache
# Check it's registered:
ldconfig -p | grep mylib
# See what libs a binary needs:
ldd /usr/bin/python3Reference
Common options and variations
| Command or option | Use |
|---|---|
sudo ldconfig | Rebuild library cache |
ldconfig -p | Print all cached libraries |
ldconfig -p | grep libname | Check if a library is registered |
ldd /usr/bin/app | Show which libraries a binary requires |
Distro differences
Debian/Ubuntu vs Fedora vs Arch
Debian/Ubuntu, Fedora and Arch all use "sudo ldconfig" for this mapping. The command syntax shown here is portable across the three rows, although installed versions and system defaults can still vary.
| Distribution | Package manager / base | Equivalent command | Difference to notice |
|---|---|---|---|
| Debian/Ubuntu | same command | sudo ldconfig |
Same command on this distribution. |
| Fedora | same command | sudo ldconfig |
Same command on this distribution. |
| Arch | same command | sudo ldconfig |
Same command on this distribution. |
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