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Side note maybe, but is there an alternative to chaining two greps?

▲ ykonstant 7 hours ago | parent [-]

The most portable way to do it with minimal overhead is with sed:

  sed -e '/pattern1/!d' -e '/pattern2/!d'

which generalizes to more terms. Easier to remember and just as portable is

  awk '/pattern1/ && /pattern2/'

but now you need to launch a full awk.

	▲	jrpelkonen 3 hours ago \| parent [-]
		These are good suggestions, but maybe it’s worth noting that one of the solutions offered in the article is not equivalent: `tail -f /some/log/file \| grep -E 'thing1.*thing2'` This will only match if the subpatterns, i.e. thing1 & thing2, are in this order, and also require that the patterns do not overlap.