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47 lines
1.5 KiB
47 lines
1.5 KiB
4 years ago
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#!/bin/sh -eux
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echo "reduce the grub menu time to 1 second"
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sed -i -e 's/^GRUB_TIMEOUT=[0-9]\+$/GRUB_TIMEOUT=1/' /etc/default/grub
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grub2-mkconfig -o /boot/grub2/grub.cfg
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echo "Remove development and kernel source packages"
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yum -y remove gcc cpp gc kernel-devel kernel-headers glibc-devel elfutils-libelf-devel glibc-headers kernel-devel kernel-headers
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echo "Remove previous kernels that preserved for rollbacks"
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if ! command -v package-cleanup >/dev/null 2>&1; then
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yum -y install yum-utils
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fi
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package-cleanup --oldkernels --count=1 -y
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echo "clean all package cache information"
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yum -y clean all --enablerepo=\*;
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# Clean up network interface persistence
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rm -f /etc/udev/rules.d/70-persistent-net.rules;
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mkdir -p /etc/udev/rules.d/70-persistent-net.rules;
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rm -f /lib/udev/rules.d/75-persistent-net-generator.rules;
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rm -rf /dev/.udev/;
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for ndev in `ls -1 /etc/sysconfig/network-scripts/ifcfg-*`; do
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if [ "`basename $ndev`" != "ifcfg-lo" ]; then
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sed -i '/^HWADDR/d' "$ndev";
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sed -i '/^UUID/d' "$ndev";
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fi
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done
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echo "truncate any logs that have built up during the install"
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find /var/log -type f -exec truncate --size=0 {} \;
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echo "remove the contents of /tmp and /var/tmp"
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rm -rf /tmp/* /var/tmp/*
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echo "Force a new random seed to be generated"
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rm -f /var/lib/systemd/random-seed
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echo "Wipe netplan machine-id (DUID) so machines get unique ID generated on boot"
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truncate -s 0 /etc/machine-id
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echo "Clear the history so our install commands aren't there"
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rm -f /root/.wget-hsts
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export HISTSIZE=0
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