Boot Fedora 19/20/21 faster with out-of-the-box fine tuning.

fedora-boost.sh

#!/bin/bash

#Disable SELINUX
setenforce 0
echo "SELINUX=disabled" > /etc/selinux/config
echo "SELINUXTYPE=targeted" >> /etc/selinux/config

#Disable IPv6
echo "net.ipv6.conf.all.disable_ipv6=1" >> /etc/sysctl.conf
echo "net.ipv6.conf.all.accept_redirects=0" >> /etc/sysctl.conf
echo "net.ipv6.conf.all.accept_source_route=0" >> /etc/sysctl.conf
echo "net.ipv6.conf.default.disable_ipv6=1" >> /etc/sysctl.conf
echo "net.ipv6.conf.default.accept_redirects=0" >> /etc/sysctl.conf
echo "net.ipv6.conf.default.accept_source_route=0" >> /etc/sysctl.conf
sed -i 's/udp6/#udp6/' /etc/netconfig 2>/dev/null
sed -i 's/tcp6/#tcp6/' /etc/netconfig 2>/dev/null

#Disable startup-stuff
cd /lib/systemd/system

for i in fedora*storage* lvm2-monitor.* mdmonitor*.*; do
  
  systemctl mask $i
  
done

for i in livesys livesys-late spice-vdagentd cups smartd firewalld atd; do
  
  chkconfig $i off
  
done

for i in abrt*.service nfs firewalld remote-fs auditd.service avahi-daemon.* bluetooth.* dev-hugepages.mount dev-mqueue.mount \
fedora-configure.service fedora-loadmodules.service fedora-readonly.service ip6tables.service \
iptables.service irqbalance.service mcelog.service rsyslog.service sendmail.service sm-client.service \
sys-kernel-config.mount sys-kernel-debug.mount; do
  
  systemctl mask $i
  
done

for i in *readahead*; do
  
  systemctl mask $i
  
done

#Skip grub timeout menu
sed -i 's/GRUB_TIMEOUT=5/GRUB_TIMEOUT=0/' /etc/default/grub 2>/dev/null
sed -i 's/set timeout=5/set timeout=0/' /boot/grub2/grub.cfg 2>/dev/null
sed -i 's/set timeout=5/set timeout=0/' /etc/grub2.cfg 2>/dev/null
grub2-mkconfig -o /boot/grub2/grub.cfg 2>/dev/null

# Timeout in seconds; syslinux uses 10ths
# 0 means wait forever, so instead we'll go with 1
sed -i 's/^timeout 10/timeout 1/' /boot/extlinux/extlinux.conf 2>/dev/null

#Skip disk checks
sed -i 's/1 1/0 1/' /etc/fstab
sed -i 's/1 2/0 2/' /etc/fstab

#Disable finger printing
authconfig --disablefingerprint --update

#Turn up file descriptors for all users 
ulimit -n 999999
echo '* hard nofile 999999' >> /etc/security/limits.conf 
echo '* soft nofile 999999' >> /etc/security/limits.conf 

#Turn off defragging 
echo "never" > /sys/kernel/mm/transparent_hugepage/defrag
echo "never" > /sys/kernel/mm/transparent_hugepage/enabled

#Only allow swapping around 80-90% CPU usage
echo "vm.swappiness=0" >> /etc/sysctl.conf
echo "kernel.randomize_va_space=1" >> /etc/sysctl.conf
echo "kernel.exec-shield=0" >> /etc/sysctl.conf
echo "vm.dirty_ratio=3" >> /etc/sysctl.conf
echo "vm.dirty_background_ratio=2" >> /etc/sysctl.conf
echo "vm.overcommit_memory=1" >> /etc/sysctl.conf
echo "vm.mmap_min_addr=4096" >> /etc/sysctl.conf

#Turn on TRIM and setup cronjob
yum install -y hdparm
if [[ `hdparm -I /dev/sda | grep TRIM` != '' ]]; then
  sed -i 's|issue_discards\ =\ 0|issue_discards\ =\ 1|g' /etc/lvm/lvm.conf
  echo '00 6	* * 7	/sbin/fstrim -v /' >> /var/spool/cron/root
fi

#Remove plymouth startup banner
yum remove -y 'plymouth*' hdparm
dracut -f

sysctl -p

Started At:

Startup finished in 402ms (kernel) + 891ms (initrd) + 6.188s (userspace) = 7.483s

Now:

Startup finished in 387ms (kernel) + 846ms (initrd) + 5.578s (userspace) = 6.813s