adding info in basic_cmd

Linux/basic_cmd.md

@@ -43,7 +43,7 @@ Note: We can use an absolute path from any location where as if you want to use
 ```
 
 ## Wildcard
-### \* Show all picture (multiple char)
+### \* show all picture (multiple char)
 ```bash
  $ ls pic*  
 ```
@@ -51,7 +51,7 @@ Note: We can use an absolute path from any location where as if you want to use
 ```bash
  $ ls pic5?.jpg  
 ```
-[] show only if char in [p-P]
+### [] show only if char in [p-P]
 ```bash
  $ ls [pP]ic*
 ```
@@ -79,15 +79,13 @@ back to previous folder
 ### Mkdir: Make directory
 ```bash
  $ mkdir test1 test2 test3
-
  $ mkdir -p lol/lol/lol     
 ```
 -p to create parent directory if needed
 
 ### Rmdir: Remove directory
 ```bash
- $  rmdir filename
-
+ $ rmdir filename
  $ rm -rf filename
 ```
 
@@ -114,7 +112,6 @@ Remove all files with the .doc extension recursively in the current working dire
 ### Touch: change file timestamps but it can also create files   
 ```bash
  $ touch nomdefichier.md  
-
  $ touch pic{00..99}.jpeg # does not work
 ```
   
@@ -223,7 +220,7 @@ total 4
 
 ```
 
-##Using chmod in absolute mode
+## Using chmod in absolute mode
 
 In the absolute mode, permissions are represented in numeric form (octal system to be precise). In this system, each file permission is represented by a number.
 
@@ -289,7 +286,7 @@ marie steve
 
 ## Sysadmin tools 
 
-ss### Who:
+### Who:
 ```bash
 student@debianserver:/var/log$ who
 waldek   tty1         2021-04-08 11:06
@@ -383,6 +380,7 @@ steve:x:1002:1002:,,,:/home/steve:/bin/fish
 
 ```
 
+## how to navigate in a web page source code 
 ### Pipe | : pipe send result of the first command to the second
 ```bash
  $ cat /etc/passwd **|** **grep** bash |**cut** -d ":" -f1 
@@ -410,6 +408,7 @@ Or, to search the current directory and all subdirectories, omit the path at the
 ###  Wc: print newline, word, and byte counts for each file
 ```bash
  $ wc -l
+```
 
 ### Realpath
 
@@ -418,8 +417,6 @@ $ realpath example.txt
 /home/username/example.txt
 ```
 
-## how to navigate in a web page source code 
-
 ### Wget: The non-interactive network downloader
 
 ```bash
@@ -433,7 +430,7 @@ $ cat index.html | grep -o "https.*" |cut -d "\"" -f1 |sort | uniq
 ```
 
 ## text editor
-- Nano: Nano's ANOther editor, an enhanced free Pico clone
+### Nano: Nano's ANOther editor, an enhanced free Pico clone
 (simple text editor for noobies) 
 
 ```bash