![]() ![]() ![]() Linux kernel panic does not core dump to a file. Ln -sf /lib/systemd/system/rescue.target /etc/systemd/system/default.target Single User Mode RHEL 7 with pxe boot with chrooted env If using GRUB, then, at the menu for choosing kernel, do: To boot into single user mode for maintenance,Įnter "linux single" or "linux emergency" at the LILO boot: prompt. RHEL4 - binary compatible with FC3 (and maybe FC4) RHE元 - binary compatible with FC2 (but FC2 is EOL) Kill script should be placed in rc6.d, which shutdown/reboot scan. If adding a Start script, may want to add them in both in rc3.d and rc5.d, unless it is really only wished to be available at one of the run level and not the other. So, if default init is 5, script in run level 3 would not be run. Amazon Linux is based on RHEL/CentOS 7, but have their own tweaks.Scientific Linux has 'fastbugs' and 'security' updates.Oracle Linux (is it still around?) is essentially RHEL, but support is provided from Oracle directly.Yum list-sec # list rpm with sec update avail, they may or may not have been applied already. Yum -security check-update # a very long list, include already installed fixes. somehow slightly diff result list than yum -security upgrade or yum list-sec Yum info-sec # list avail security update, with description. Yum -security upgrade # install only rpm that are needed to fix security issues. Updates should be logged to /var/log/yum.log may not be comprehensive?īut yum-cron with security only on CentOS and Rocky would be safer than without it. ![]() CentOS pivot to upstream, and Fedora marking some update as security. Lack of action in output does NOT mean security patches aren't needed! See CentOS forumīut. In the past, this did NOT work in CentOS. RedHat provides a yum-security plugin that allows machine to be patched with only security update via yum (and keep the OS at the same level).RedHat provides commercial tech support.What is Linux anyway? :)įunny/ugly/stupid chars when pasting? See Ubuntu is conquering the world now, so there are some Debian things here and there. It is RedHat centric.ĬentOS is supposed to be a "rebadged/un-commercialized" version of RHEL, keeping binary-level compatibilities at major release level, thus the discussion should apply equally to CentOS and Scientifi Linux. ![]() This Linux guide is my own notes on Linux, for stuff that I did not like toĭocuments that I have found on the internet. ![]()
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