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--- bash_notes [2022/11/08 20:28] – [documentation links] raju
+++ bash_notes [2023/12/28 08:49] (current) – [other pages in this wiki] raju
@@ Line 4: / Line 4: @@
 ===== dummy =====
+==== other pages in this wiki ====
+  * [[bash scripting]]
+  * [[shell scripting notes]]
 ==== useful links ====
   * https://explainshell.com/ - useful for understanding complex shell commands
@@ Line 14: / Line 18: @@
 ==== what is the difference between "ls > dirlist 2>&1" and "ls 2>&1 > dirlist"? ====
+The command
+<code>
+ls > dirlist 2>&1
+</code>
+directs both standard output (file descriptor 1) and standard error (file descriptor 2) to the file dirlist, while the command
+<code>
+ls 2>&1 > dirlist
+</code>
+directs only the standard output to file dirlist, because the standard error was made a copy of the standard output before the standard output was redirected to dirlist.
+To conclude, the order of redirections is significant.
+Ref:- https://www.gnu.org/software/bash/manual/html_node/Redirections.html -> 5th paragraph.
 ===== getopts =====