New answers tagged documentation
perl -h is useful -e program: one line of program (several -e's allowed, omit programfile) -p: assume loop like -n but print line also, like sed
I don't think it'd be common to interpret tool -f BAR | --foo BAR as «pipe the output of tool -f BAR into the command --foo BAR». So I'd use simply tool -f BAR | --foo BAR There's other possibilities in the wild using additional markup, specially if the invocation is more complex, to make it more obvious. Unlike with optional arguments and  though, none ...
Top 50 recent answers are included