Move pages under tldr, lint run.sh, update docs

tldr/gdb

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gdb
+
+> The GNU Debugger.
+> More information: <https://www.gnu.org/software/gdb>.
+
+- Debug an executable:
+
+`gdb {{executable}}`
+
+- Attach a process to gdb:
+
+`gdb -p {{procID}}`
+
+- Debug with a core file:
+
+`gdb -c {{core}} {{executable}}`
+
+- Execute given GDB commands upon start:
+
+`gdb -ex "{{commands}}" {{executable}}`
+
+- Start `gdb` and pass arguments to the executable:
+
+`gdb --args {{executable}} {{argument1}} {{argument2}}`