Printing control characters

We can echo a control char as per the below;

echo -e '\x07'

The above will give us a BEL

if we want to add control characters to a file, we can do;

printf 'hello there \x07 my name is Snake' > test.txt

if we then cat test.txt, well see the text and a BEL

We can of course send this to a serial port with something like cat test.txt > /dev/ttyS0

Some control characters are below;

• CTRL-A: \x01
• CTRL-B: \x02
• CTRL-C: \x03
• CTRL-D: \x04
• CTRL-E: \x05
• CTRL-F: \x06
• CTRL-G: \x07
• CTRL-H (Backspace): \x08
• CTRL-I (Tab): \x09
• CTRL-J (Line Feed): \x0A
• CTRL-K (Vertical Tab): \x0B
• CTRL-L (Form Feed): \x0C
• CTRL-M (Carriage Return): \x0D
• CTRL-N: \x0E
• CTRL-O: \x0F
• CTRL-P: \x10
• CTRL-Q: \x11
• CTRL-R: \x12
• CTRL-S: \x13
• CTRL-T: \x14
• CTRL-U: \x15
• CTRL-V: \x16
• CTRL-W: \x17
• CTRL-X: \x18
• CTRL-Y: \x19
• CTRL-Z: \x1A
• CTRL-[ (Escape): \x1BCTRL-\ 
• (File Separator): \x1CCTRL-] 
• (Group Separator): \x1DCTRL-^ 
• (Record Separator): \x1ECTRL-_ 
• (Unit Separator): \x1FCTRL-? 
• (Delete): \x7F 

(Table: 1) HEX ASCII chart (for example BEL = 007 or \x07) [source]

(Table: 2) DECIMAL ASCII chart (for example BEL = 007 or \x07) [source]

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  (Table: 3)

  
  

  

  (Table: 4)