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I am trying to print a output with specific format, where output is in a enclosed box. I am using "|" and "-" for creating it. The output I print in between the "|" are variables with Different number of characters. This is messing my format.

I have tried the below code

nodename=$(hostname)
cpu=$(cat /proc/cpuinfo | awk '/^processor/{print $3}' | wc -l)
echo " ------------------------------------------------------------------"  
echo "|                                                                  |" 
echo "|          This is Bash Scripting                                  |" 
echo "|                                                                  |" 
echo "|  1 - This Machine Name is $nodename                              |" 
echo "|  2 - This Machine has $cpu CPU's                                 |"
echo "|                                                                  |" 
echo " -------------------------------------------------------------------"

actual Result 

" ------------------------------------------------------------------"  
"|                                                                  |" 
"|          This is Bash Scripting                                  |" 
"|                                                                  |" 
"|  1 - This Machine Name is test                              |" 
"|  2 - This Machine has 8 CPU's                                 |"
"|                                                                  |" 
" -------------------------------------------------------------------"

Expected result

" ------------------------------------------------------------------"  
"|                                                                  |" 
"|          This is Bash Scripting                                  |" 
"|                                                                  |" 
"|  1 - This Machine Name is test                                   |" 
"|  2 - This Machine has 8 CPU's                                    |"
"|                                                                  |" 
" -------------------------------------------------------------------"
Anger Density
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Chand
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    [Bash add trailing spaces to justify string](https://unix.stackexchange.com/q/354092), [How do I print some text in bash and pad it with spaces to a certain width?](https://stackoverflow.com/q/6345429/608639), [Padding characters in printf](https://stackoverflow.com/q/4409399/608639), [Formatting output with printf: truncating or padding](https://stackoverflow.com/q/36121180/608639), etc. – jww Aug 23 '19 at 13:21
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    `grep -c processor /proc/cpuinfo`. One process instead of three. You don't need `awk` to extract the processor number when all you are doing is counting how many there are. – chepner Aug 23 '19 at 13:28

1 Answers1

4

Use printf instead of echo:

printf "|  1 - This Machine Name is %-39s|\n" "$nodename"

You can specify the right space padding with %-39s

chepner
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oliv
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