Remember a simple SH script that protects if

Really pit father, on the following SH, unexpectedly also wrote for a long time!

if ' /usr/xx/bin/tomcat ' ] then"Rstall are not allowed in the currentdir: ' pwd '!          "        return fi. /bin/rstmst.sh, .... /tomcat-bb/bin/rstns.sh

If the syntax is really troublesome, the Linux if syntax is really served!

If followed by [], instead of () Rub!

There must be a line break between if and then!  ———— where is it written?? How am I supposed to get that?

Return cannot be replaced with exit, otherwise quit shell ...

The then and the specific statements must also be wrapped!

The End is FI!

Remember a simple SH script that protects if