linux - . / instead of / in crontab -

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i'm having error while trying execute sh in crontab (or in normal shell) . made user xuser, , in home directory make symbolic link /opt/app /opt/app --> drwxrwxr-- xuser test in folder save serveral sh , jar.

now in crontab of user or in shell if tried execute this:

./opt/app/bin/ind.sh -bash: ./opt/app/bin/ind.sh: no such file or directory

the sh file 

#!/bin/sh export java_home=/usr/java/latest/ export path=$path:$java_home export path=$path:$java_home/bin  java -jar /opt/app/bin/ind.jar

if put space between . / works 

. /opt/app/bin/ind.sh : command not found error: unable access jarfile /opt/app/bin/ind.jar

( access sh seems problem pass jar hahaha )

someone notice problem??

thanks !!!

there big difference, when put space between . , / . no more part of file path alias of source , means "execute content of file in current shell".

// execute in subshell ./foo/bar/baz.sh  // execute in shell . ./foo/bar/baz.sh  // not same file previously, unless @ root (/) . /foo/bar/baz.sh

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