On Fri, 22 Jan 2021 at 02:33, Stephen Morris <samor...@netspace.net.au> wrote:
> > Just on the topic of rkhunter, I've run the command rkhunter --check and > gotten a number of warnings. Among them were warnings about > /usr/bin/egrep, /usr/bin/fgrep, /usr/libexec/nm-ifdown and > /usr/libexec/nm-ifup having been replaced by a script and obviously not > whitelisted. Would the replacement of those commands be something done > within package management and rkhunter hasn't been updated to cater for > that, or am I encountering a situation where those commands have been > changed by something outside of the package management environment? > > >From "info grep": In addition, two variant programs ‘egrep’ and ‘fgrep’ are available. ‘egrep’ is the same as ‘grep -E’. ‘fgrep’ is the same as ‘grep -F’. Direct invocation as either ‘egrep’ or ‘fgrep’ is deprecated, but is provided to allow historical applications that rely on them to run unmodified. Shorthand like "egrep" for "grep -E" were helpful when working at 300 baud. Years ago some UNIX systems used hard links. Today, not all linux distros include egrep and fgrep. Unless you need "historical applications that rely on them", just remove "egrep" and "fgrep" -- George N. White III
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