UNIX Command Line

The script:

#/bin/bash

_Box () {
    str="$@"
    len=$((${#str}+4))
    for i in $(seq $len); do echo -n '*'; done;
    echo; echo "* "$str" *";
    for i in $(seq $len); do echo -n '*'; done;
    echo
}

_Box "Welcome to AUDIT menu"

Execute the script:

$ ./box.sh
*************************
* Welcome to AUDIT menu *
*************************

Some points on the above script:

a) In the script, _Box is a function for generating style box. Any text sent as its argument will be shown within a stylish text box (as we saw above)

b) $@ : List of all shell arguments (here arguments to the function _Box)

c) len variable will be assigned to length of the string(argument)+4. Read how we can find string length in bash here

d) The for loops will print "len" number of * (read about seq)

e) -n option with echo (-n: do not output the trailing newline)

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- Generate a chess board pattern in bash scripting