Update cheatsheets

linux/sed

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sed
+
+> Edit text in a scriptable manner.
+> See also: `awk`, `ed`.
+> More information: <https://www.gnu.org/software/sed/manual/sed.html>.
+
+- 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'`
+
+- 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'`
+
+- 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}}`
+
+- Execute a specific script [f]ile and print the result to `stdout`:
+
+`{{command}} | sed -f {{path/to/script.sed}}`
+
+- Print just the first line to `stdout`:
+
+`{{command}} | sed -n '1p'`
+
+- [d]elete the first line of a file:
+
+`sed -i 1d {{path/to/file}}`
+
+- [i]nsert a new line at the first line of a file:
+
+`sed -i '1i\your new line text\' {{path/to/file}}`