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Recently installed debian 9 on my computer. I'd like to install the package 'readahead' but seems like I cannot find it. Should I install it from a previous debian version?

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The package readahead is only available for debian Wheezy and Jessie. Also it has removed from systemd.

systemd's readahead implementation has been removed. In many circumstances it didn't give expected benefits even for rotational disk drives and was becoming less relevant in the age of SSDs. As none of the developers has been using rotating media anymore, and nobody stepped up to actively maintain this component of systemd it has now been removed.

Freedesktop-systemd-line#n950

In Linux distributions that use systemd, readahead binary (as part of the boot sequence) was replaced by systemd-readahead.[4][5] However, support for readahead was removed from systemd in its version 217, being described as unmaintained and unable to provide expected performance benefits

readahead on wikipedia

Should I install it from a previous debian version?

Installing a package from a previous debian distribution is possible using the pinning way, but it is not recommended.

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