# Troubleshooting Tools Installed by Default
The following troubleshooting tools are included in the full version of Photon OS:
* `grep`. Searches files for patterns.
* `ping`. Tests network connectivity.
* `strings`. Displays the characters in a file to identify its contents.
* `lsmod`. Lists loaded modules.
* `ipcs`. Shows data about the inter-process communication (IPC) resources to which a process has read access. This data includes shared memory segments, message queues, and semaphore arrays.
* `nm`. Lists symbols from object files.
* `diff`. Compares files side by side. This tool is useful to compare configuration files of two versions when one version works and the other does not.