Hopefully people wouldn't give up at that and instead search something like "bash syntax" and find the manual : https://www.gnu.org/software/bash/manual/bash.h

Hopefully people wouldn't give up at that and instead search something like "bash syntax" and find the manual : https://www.gnu.org/software/bash/manual/bash.html#Bash-Conditional-Expressions https://www.gnu.org/software/bash/manual/bash.html#Bash-Cond...