It is splitting hairs to make a big deal out of actual Unix experience vs Linux experience.
This only holds true if one is a UNIX Graybeard, otherwise, GNU/Linux is rife with pitfalls and minefields for the unwary. Shell scripting and GNU-isms or bash-isms is an example of this, or using GNU specific functions or semantics when programming yet another. There are many such landmines lying in wait on GNU/Linux, waiting to blow one's legs off. The BSD guys have been trying to raise awareness of this for years.
This only holds true if one is a UNIX Graybeard, otherwise, GNU/Linux is rife with pitfalls and minefields for the unwary. Shell scripting and GNU-isms or bash-isms is an example of this, or using GNU specific functions or semantics when programming yet another. There are many such landmines lying in wait on GNU/Linux, waiting to blow one's legs off. The BSD guys have been trying to raise awareness of this for years.