It s easy to see the difference between (Best web hosting) $@and
It s easy to see the difference between $@and $*by trying them out: $ IFS= $ set foo bar bam$ echo $@ foo bar bam $ echo $* foobarbam $ unset IFS$ echo $* foo bar bamAs you can see, within double quotes, $@expands the positional parameters as separate fields, regard- less of the IFSvalue. In general, if you want access to the parameters, $@is the sensible choice. In addition to printing the contents of variables using the echocommand, we can also read them byusing the readcommand. Try It Out Parameter and Environment VariablesThe following script demonstrates some simple variable manipulation. Once you ve typed the script it as try_var, don t forget to make it executable with chmod +x try_var. #!/bin/shsalutation= Hello echo $salutationecho The program $0 is now running echo The second parameter was $2 echo The first parameter was $1 echo The parameter list was $* echo The user s home directory is $HOME echo Please enter a new greeting read salutationecho $salutationecho The script is now complete exit 0If we run this script, we get the following output: $ ./try_var foo bar bazHelloThe program ./try_var is now runningThe second parameter was barThe first parameter was fooThe parameter list was foo bar bazThe user s home directory is /home/rickPlease enter a new greetingSireSireThe script is now complete$
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