Differences

This shows you the differences between two versions of the page.

--- linux:bash [2022/02/11 11:02] – [Generalities] mh
+++ linux:bash [2022/02/28 14:53] – [Redirect to one file] mh
@@ Line 19: / Line 19: @@
 Bash is **not a strict interpreter**.
-Beware of the ambiguity we are used to while expressing ourselves with human languages.
+**Beware of the ambiguity** we are used to while expressing ourselves with human languages.
-The discipline of writing clear, safe and precise code lies heavily upon the user.
+The **discipline of writing clear, safe and precise code** lies heavily upon the user.
-**Don't write bad bash code.**
+__**Don't write bad bash code.**__
 </WRAP>
@@ Line 35: / Line 35: @@
 Many command types are syntax sugar: their effect can be achieved differently, but they exist to make the job easier.
 </WRAP>
+==== Variables ====
+Before a command's name you can insert one or many ''var=value'' assignments. These variables will apply only to that one command.
 ==== Basic commands ====
@@ Line 41: / Line 45: @@
 Bash performs a search using this name and looks for :
-  *alias (first)
+  *alias (before anything else)
   *functions
   *built-in commands
@@ Line 59: / Line 63: @@
 $ echo $name
 john
+</code>
+----
+=== type ===
+Displays information on a command, and where it is stored.
+//Note that the **type** command and the **which** program are different and give different outputs//
+**Example**
+<code bash>
+$ type ls
+ls is aliased to 'ls -al'
 </code>
 ----
@@ Line 102: / Line 119: @@
 They can be a filename, a variable name, the name of a program or just a litteral.
+Multiple arguments can be used, separated by a blank space
 </WRAP>
@@ Line 324: / Line 343: @@
 As a result, both file descriptors are connected to the same stream.
+Be careful not to write something like ''$ ls -l a b >myfiles.ls 2>myfiles.ls'' as due to the way streams are handled they will most likely end up mixing up and garbling the file 'myfiles.ls'
 </WRAP>