將 inittab 裡的 2 至 6 marked 掉
能提昇/改善多少效能?

1. less /etc/inittab
…
# Run gettys in standard runlevels
1:2345:respawn:/sbin/mingetty tty1
2:2345:respawn:/sbin/mingetty tty2
3:2345:respawn:/sbin/mingetty tty3
4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5
6:2345:respawn:/sbin/mingetty tty6
…

2.開機 8 分鐘後來看 top：

top – 18:41:33 up 8 min, 1 user, load average: 0.00, 0.07, 0.06
Tasks: 57 total, 1 running, 56 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 742636k total, 179408k used, 563228k free, 9920k buffers
Swap: 458744k total, 0k used, 458744k free, 137192k cached

3. vi /etc/inittab
…
# Run gettys in standard runlevels
1:2345:respawn:/sbin/mingetty tty1
#2:2345:respawn:/sbin/mingetty tty2
#3:2345:respawn:/sbin/mingetty tty3
#4:2345:respawn:/sbin/mingetty tty4
#5:2345:respawn:/sbin/mingetty tty5
#6:2345:respawn:/sbin/mingetty tty6
…

4. 開機 8 分鐘後：

top – 18:50:50 up 8 min, 1 user, load average: 0.00, 0.08, 0.06
Tasks: 52 total, 2 running, 50 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 0.3% sy, 0.0% ni, 99.7% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 742636k total, 178620k used, 564016k free, 10164k buffers
Swap: 458744k total, 0k used, 458744k free, 136648k cached

報告 Linda ：
ssh 的多人登入還是沒問題，只是 physical console，只剩一枚