I don't think there's anything wrong with that. Anyone in a sysadmin or devops is going to be expected to be proficient at Linux and bash, Windows and Powershel

I don't think there's anything wrong with that. Anyone in a sysadmin or devops is going to be expected to be proficient at Linux and bash, Windows and Powershell for Windows desktop/server admins, Cisco and Juniper for networking, etc. These are kind of default assumptions for positions like these. More modern and highly specific technologies like HAproxy, Salt, Node, Redis are not going to be known by every experienced, competent applicant though, and while you can often pick them up on the job if you have general experience in the area, there's always going to be a learning curve.