Update cheatsheets

openbsd/sed

@@ -0,0 +1,34 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sed
+
+> Edit text in a scriptable manner.
+> See also: `awk`, `ed`.
+> More information: <https://man.openbsd.org/sed.1>.
+
+- Replace all `apple` (basic regex) occurrences with `mango` (basic regex) in all input lines and print the result to `stdout`:
+
+`{{command}} | sed 's/apple/mango/g'`
+
+- Execute a specific script [f]ile and print the result to `stdout`:
+
+`{{command}} | sed -f {{path/to/script.sed}}`
+
+- Delay opening each file until a command containing the related `w` function or flag is applied to a line of input:
+
+`{{command}} | sed -fa {{path/to/script.sed}}`
+
+- Replace all `apple` (extended regex) occurrences with `APPLE` (extended regex) in all input lines and print the result to `stdout`:
+
+`{{command}} | sed -E 's/(apple)/\U\1/g'`
+
+- Print just a first line to `stdout`:
+
+`{{command}} | sed -n '1p'`
+
+- Replace all `apple` (basic regex) occurrences with `mango` (basic regex) in a specific file and overwrite the original file in place:
+
+`sed -i 's/apple/mango/g' {{path/to/file}}`