Update cheatsheets

tldr/docker-rmi

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # docker rmi
 
 > Remove Docker images.
-> More information: <https://docs.docker.com/engine/reference/commandline/rmi/>.
+> More information: <https://docs.docker.com/reference/cli/docker/image/rm/>.
 
 - Display help:
 

tldr/nnn

@@ -27,3 +27,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Sort files on [a]pparent disk usage / [d]isk usage / [e]xtension / [r]everse / [s]ize / [t]ime / [v]ersion:
 
 `nnn -T {{a|d|e|r|s|t|v}}`
+
+- Open a file you have selected. Select the file then press `o`, and type a program to open the file in:
+
+`nnn -o`

tldr/tspin

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# tspin
+
+> A log file highlighter based on the `less` pager and basically behaves like any pager.
+> More information: <https://github.com/bensadeh/tailspin>.
+
+- Read from file and view in `less`:
+
+`tspin {{path/to/application.log}}`
+
+- Read from another command and print to stdout:
+
+`journalctl -b --follow | tspin`
+
+- Read from file and print to `stdout`:
+
+`tspin {{path/to/application.log}} --print`
+
+- Read from stdin and print to `stdout`:
+
+`echo "2021-01-01 12:00:00 [INFO] This is a log message" | tspin`