码神Linux01

1、SSH远程服务的管理操作

A、通过两种方式来拒绝开放一个端口22（SSH端口）:

要求：一种是通过修改配置文件并重新加载配置；另一种是通过命令操作方式来实现开放一个端口，并测试端口是否通。

方法一：[root@bogon ~]#firewall-cmd --remove-port=80/tcp --permanent

方法二： [root@bogon ~]#vi /etc/firewalld/zones/public.xml

B、通过两种方式来结束ssh服务，并把步骤写在上面；

第一种：[root@bogon ~]#systemctl stop sshd.service

第二种：[root@bogon ~]#ps –aux |grep ssh

                      [root@bogon ~]#kill -9 PID

C、把ssh服务设置成开机禁用，并把步骤及效果写在上面。

[root@bogon ~]#systemctl disablesshd.service

Removed symlink/etc/systemd/system/multi-user.target.wants/sshd.service.

2、查看自己虚拟机的软（系统）硬件（CPU、内存、硬盘、主板）信息，并把信息打出的结果打印在作业上。

[root@bogon ~]#lscpu

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 60
Model name:            Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz
Stepping:              3
CPU MHz:               2494.235
BogoMIPS:              4988.47
Hypervisor vendor:     VMware
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              3072K
NUMA node0 CPU(s):     0

[root@bogon ~]# more /proc/meminfo 
MemTotal:        1868660 kB
MemFree:          427344 kB
MemAvailable:     849604 kB
Buffers:            1084 kB
Cached:           511908 kB
SwapCached:            0 kB
Active:           656980 kB
Inactive:         385260 kB
Active(anon):     530104 kB
Inactive(anon):     9720 kB
Active(file):     126876 kB
Inactive(file):   375540 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:       2097148 kB
SwapFree:        2097148 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:        529288 kB
Mapped:           108372 kB
Shmem:             10576 kB
Slab:             125244 kB
SReclaimable:      64936 kB
SUnreclaim:        60308 kB
KernelStack:       12864 kB
PageTables:        24608 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     3031476 kB
Committed_AS:    2893744 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      173092 kB
VmallocChunk:   34359556996 kB
HardwareCorrupted:     0 kB
AnonHugePages:    280576 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:      110464 kB
DirectMap2M:     1986560 kB
DirectMap1G:           0 kB

[root@bogon ~]# smartctl -a /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.10.0-327.el7.x86_64] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org


=== START OF INFORMATION SECTION ===
Vendor:               VMware,
Product:              VMware Virtual S
Revision:             1.0
User Capacity:        32,212,254,720 bytes [32.2 GB]
Logical block size:   512 bytes
Device type:          disk
Local Time is:        Tue Jul 19 13:19:59 2016 CST
SMART support is:     Unavailable - device lacks SMART capability.

[root@bogon ~]# dmidecode |grep -A16 "System Information$"
System Information
        Manufacturer: VMware, Inc.
        Product Name: VMware Virtual Platform
        Version: None
        Serial Number: VMware-56 4d 75 67 93 8b aa e9-f9 aa ec 7e 3e 81 02 7f
        UUID: 67754D56-8B93-E9AA-F9AA-EC7E3E81027F
        Wake-up Type: Power Switch
        SKU Number: Not Specified
        Family: Not Specified


Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
        Manufacturer: Intel Corporation
        Product Name: 440BX Desktop Reference Platform
        Version: None
        Serial Number: None
        Asset Tag: Not Specified