Linux shell If Judge times not found error resolution method

Recently a project needs to write a Linux shell script, in the Linux specified directory to traverse the *.sql file, if any, execute the file (inside the file is an UPDATE statement), when traversing the folder always reported a [Sql:not found error, almost collapsed, Later only to know the reason, specially for everyone to share under, hope other people less detours

If judging the block has a hole,ifSpace[Space$?-eq 0Space]; If followed by a space, the conditions are also added to the space, the following is a comparison of numbers and string comparison examples

---------number

If [1-eq 2];then

Fi

--------string

If [' a ' = ' V '];then

Fi

Hope to help other people! ：）

Linux shell If Judge times not found error resolution method