PC 规格为： ''' Linux krishna-3000-N200 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux ''' PC 的 lshw 如下：
''' 描述：计算机宽度：64 位功能：smp vsyscall32
*-core 描述：主板物理 ID：0 *-memory 描述：系统内存物理 ID：0 大小：4GiB *-cpu 产品：Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz 供应商：Intel Corp. 物理 ID：1 总线信息：cpu@0 大小：1318MHz 容量：1667MHz 宽度：64 位
*-pci
description: Host bridge
product: Mobile PM965/GM965/GL960 Memory Controller Hub
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 0c
width: 32 bits
clock: 33MHz
*-display:0
description: VGA compatible controller
product: Mobile GM965/GL960 Integrated Graphics Controller (primary)
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0c
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:16 memory:fc000000-fc0fffff memory:d0000000-dfffffff ioport:1800(size=8) memory:c0000-dffff
*-display:1 UNCLAIMED
description: Display controller
product: Mobile GM965/GL960 Integrated Graphics Controller (secondary)
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 0c
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=0
resources: memory:fc100000-fc1fffff
'''
以下是关键路径输出。
'''
graphic.target @1分钟21.638秒
└─multi-user.target @1分钟 21.636秒
└─snapd.seeded.service @52.716s +528ms
└─snapd.service @31.105s +21.599s
└─basic.target @30.277秒
└─sockets.target @30.277s
└─snapd.socket @30.270s +6ms
└─sysinit.target @30.123s
└─snapd.apparmor.service @29.266s +856ms
└─apparmor.service @27.535s +1.728s
└─local-fs.target @27.533秒
└─run-snapd-ns-canonical\x2dlivepatch.mnt.mount @45.633s
└─run-snapd-ns.mount @43.622s
└─swap.target @27.011秒
└─dev-disk-by\x2duuid-44e357ef\x2dfd87\x2d4721\x2d8870\x2df8b1c14d9339.swap @26.939s +69ms
└─dev-disk-by\x2duuid-44e357ef\x2dfd87\x2d4721\x2d8870\x2df8b1c14d9339.device @26.936s
'''
请提出任何建议，以将启动时间从 2 分钟减少。