ng lint command - How can I execute it on only one typescript file?

As of Angular CLI version 8, you can lint a single file with

ng lint --files src/app/app.component.ts

An easy workaround:ng lint | grep nameofyourfile?

I know I am late to the party but someone else could benefit from this.We face the same issue and to solve this I have created a package

It is fairly simple package - you just need to pass command
lintone file name <file-name>

and it will display lint error associated to that file

CodeHunter