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50 lines
1.5 KiB
Bash
50 lines
1.5 KiB
Bash
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#!/bin/bash
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# DigitalOcean Marketplace Image Validation Tool
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# © 2021 DigitalOcean LLC.
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# This code is licensed under Apache 2.0 license (see LICENSE.md for details)
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set -o errexit
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# Ensure /tmp exists and has the proper permissions before
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# checking for security updates
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# https://github.com/digitalocean/marketplace-partners/issues/94
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if [[ ! -d /tmp ]]; then
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mkdir /tmp
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fi
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chmod 1777 /tmp
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if [ -n "$(command -v yum)" ]; then
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yum update -y
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yum clean all
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elif [ -n "$(command -v apt-get)" ]; then
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export DEBIAN_FRONTEND=noninteractive
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apt-get -y update
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apt-get -o Dpkg::Options::="--force-confold" upgrade -q -y --force-yes
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apt-get -y autoremove
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apt-get -y autoclean
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fi
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rm -rf /tmp/* /var/tmp/*
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history -c
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cat /dev/null > /root/.bash_history
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unset HISTFILE
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find /var/log -mtime -1 -type f -exec truncate -s 0 {} \;
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rm -rf /var/log/*.gz /var/log/*.[0-9] /var/log/*-????????
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rm -rf /var/lib/cloud/instances/*
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rm -f /root/.ssh/authorized_keys /etc/ssh/*key*
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touch /etc/ssh/revoked_keys
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chmod 600 /etc/ssh/revoked_keys
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# Securely erase the unused portion of the filesystem
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GREEN='\033[0;32m'
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NC='\033[0m'
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printf "\n${GREEN}Writing zeros to the remaining disk space to securely
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erase the unused portion of the file system.
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Depending on your disk size this may take several minutes.
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The secure erase will complete successfully when you see:${NC}
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dd: writing to '/zerofile': No space left on device\n
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Beginning secure erase now\n"
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dd if=/dev/zero of=/zerofile bs=4096 || rm /zerofile
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