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

tldr/env

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# env
+
+> Show the environment or run a program in a modified environment.
+> More information: <https://www.gnu.org/software/coreutils/env>.
+
+- Show the environment:
+
+`env`
+
+- Run a program. Often used in scripts after the shebang (#!) for looking up the path to the program:
+
+`env {{program}}`
+
+- Clear the environment and run a program:
+
+`env -i {{program}}`
+
+- Remove variable from the environment and run a program:
+
+`env -u {{variable}} {{program}}`
+
+- Set a variable and run a program:
+
+`env {{variable}}={{value}} {{program}}`
+
+- Set one or more variables and run a program:
+
+`env {{variable1}}={{value}} {{variable2}}={{value}} {{variable3}}={{value}} {{program}}`