Update cheatsheets

csh

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# csh
+
+> The shell (command interpreter) with C-like syntax.
+> See also: `tcsh`.
+> More information: <https://www.mkssoftware.com/docs/man1/csh.1.asp>.
+
+- Start an interactive shell session:
+
+`csh`
+
+- Start an interactive shell session without loading startup configs:
+
+`csh -f`
+
+- Execute specific [c]ommands:
+
+`csh -c "{{echo 'csh is executed'}}"`
+
+- Execute a specific script:
+
+`csh {{path/to/script.csh}}`