Autosave: 2022-12-11 19:00:05

Programming_Languages/Shell/Redirect_to_dev_null.md

@@ -18,6 +18,12 @@ This is a redirection statement. It is redirecting data to the `null` device on
 
 The `2>&1` argument is the content: any errors that the program may generate and try to show in stout. Notice we are using the [file descriptors](/Programming_Languages/Shell/File_descriptors_and_redirection.md) `1` and `2`.
 
+If you just want the errors regardless of whether they appear in `stdout` you do:
+
+```bash
+[some_command] > /dev/null 2>
+```
+
 ## Example
 
 I have used this in my Mongo start-up script:

Programming_Languages/Shell/Redirection.md

@@ -21,6 +21,12 @@ It is common practice to combine redirection with the [file descriptors](/Progra
 
 ## Redirecting inputs
 
+We can also switch the direction of the redirection symbol and pass in a file to a command rather than command ouput to a file:
+
+```bash
+sql-processing-program < data.sql
+```
+
 ## Appending 
 
 We use `>>` to append contents on the next available line of a pre-existing file. Continuing on from the example above:

_scripts/random_revision_topic.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+find / -type f > list_of_files.list