Bash - what does if [ ${?} -ne 0 ] mean?
 

More specifically, what does the ${?} bit mean...?

Dave

Here, ${?} is strictly equivalent to $?, which means the return value of the last executed command.

See "man bash".

Yves.

@Yeti: it is nearly impossible to search for that in the bash man page, please forgive that user for being unable to do the impossible :P

@davee: as yeti mentioned, it's the return value of the last process executed. Usually a process returns 0 on success and a non-zero value on error so this code snippet is for checking if the last executed process was being run successfully.

Cheers...! It's not the easiest thig to search for in google.

Dave

huh, why use google when LQ has a "man page" page............

http://man.linuxquestions.org/