lwp-request, ncat: reorder input redirect; read: use cat instead (#19916)

Co-authored-by: Ivan Baluta <ivanbaluta.dev@gmail.com>

pages/common/lwp-request.md

@@ -10,7 +10,7 @@
 
 - Upload a file with a POST request:
 
-`lwp-request -m POST {{http://example.com/some/path}} < {{path/to/file}}`
+`lwp-request < {{path/to/file}} -m POST {{http://example.com/some/path}}`
 
 - Make a request with a custom user agent:
 

pages/common/read.md

@@ -33,4 +33,4 @@
 
 - Read `stdin` and perform an action on every line:
 
-`while read line; do {{echo|ls|rm|...}} "$line"; done < {{/dev/stdin|path/to/file|...}}`
+`cat {{/dev/stdin|path/to/file|...}} | while read line; do {{echo|ls|rm|...}} "$line"; done`

pages/linux/ncat.md

@@ -14,7 +14,7 @@
 
 - Write output of specified file to the specified host on the specified port:
 
-`ncat {{address}} {{port}} < {{path/to/file}}`
+`ncat < {{path/to/file}} {{address}} {{port}}`
 
 - Accept multiple incoming connections on an encrypted channel evading detection of traffic content: