1、创建一个10G的文件系统，类型为ext4，要求开机可自动挂载至单独数据/data目录；

[root@centos10 /]# cat /proc/partitions 

major minor  #blocks  name


   8        0   52428800 sda

   8        1     204800 sda1

   8        2    4096000 sda2

   8        3   48126976 sda3

   8       16   10485760 sdb

[root@centos10 /]# fdisk /devsdb


Unable to open /devsdb

[root@centos10 /]# fdisk /dev/sdb

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel with disk identifier 0x68f6d495.

Changes will remain in memory only, until you decide to write them.

After that, of course, the previous content won't be recoverable.


Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)


WARNING: DOS-compatible mode is deprecated. It's strongly recommended to

         switch off the mode (command 'c') and change display units to

         sectors (command 'u').


Command (m for help): p


Disk /dev/sdb: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x68f6d495


   Device Boot      Start         End      Blocks   Id  System


Command (m for help): n

Command action

   e   extended

   p   primary partition (1-4)

p

Partition number (1-4): 1

First cylinder (1-1305, default 1): 

Using default value 1

Last cylinder, +cylinders or +size{K,M,G} (1-1305, default 1305): 

Using default value 1305


Command (m for help): p


Disk /dev/sdb: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x68f6d495


   Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1        1305    10482381   83  Linux


Command (m for help): w

The partition table has been altered!


Calling ioctl() to re-read partition table.

Syncing disks.

[root@centos10 /]# mkfs.ext4 /dev/sdb

mke2fs 1.41.12 (17-May-2010)

/dev/sdb is entire device, not just one partition!

Proceed anyway? (y,n) y

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

655360 inodes, 2621440 blocks

131072 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=2684354560

80 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks: 

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632


Writing inode tables: done                            

Creating journal (32768 blocks): 

done

Writing superblocks and filesystem accounting information: 

done


This filesystem will be automatically checked every 38 mounts or

180 days, whichever comes first.  Use tune2fs -c or -i to override.

[root@centos10 /]# 

[root@centos10 /]# 

[root@centos10 /]# cat /proc/partitions 

major minor  #blocks  name


   8        0   52428800 sda

   8        1     204800 sda1

   8        2    4096000 sda2

   8        3   48126976 sda3

   8       16   10485760 sdb

   8       17   10482381 sdb1

[root@centos10 /]# mkdir /mydata1

[root@centos10 /]# mount /dev/sdb1 /mydata1/

mount: you must specify the filesystem type

[root@centos10 /]# mount /dev/sdb /mydata1/

[root@centos10 /]# cd /mydata1/

[root@centos10 mydata1]# ls

lost+found

[root@centos10 mydata1]# ls

lost+found

[root@centos10 mydata1]# cd lost+found/

[root@centos10 lost+found]# ls

[root@centos10 lost+found]# cd ..

[root@centos10 mydata1]# ls

lost+found

[root@centos10 mydata1]# df

Filesystem     1K-blocks    Used Available Use% Mounted on

/dev/sda3       47371632 1628584  43336700   4% /

tmpfs             510148       0    510148   0% /dev/shm

/dev/sda1         198337   26862    161235  15% /boot

/dev/sdb        10321208  154100   9642820   2% /mydata1

[root@centos10 mydata1]# vi /etc/fstab

[root@centos10 mydata1]# cat /etc/fstab 


#

# /etc/fstab

# Created by anaconda on Wed Dec  9 01:17:20 2015

#

# Accessible filesystems, by reference, are maintained under '/dev/disk'

# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info

#

UUID=1a36e597-b5e2-4b66-9250-2e4af5eecf3f /                       ext4    defaults        1 1

UUID=133f8aff-57bf-41d5-8570-1d40cae3d13b /boot                   ext4    defaults        1 2

UUID=dadabadb-1467-4921-88d1-47ba1eddbf71 swap                    swap    defaults        0 0

tmpfs                   /dev/shm                tmpfs   defaults        0 0

devpts                  /dev/pts                devpts  gid=5,mode=620  0 0

sysfs                   /sys                    sysfs   defaults        0 0

proc                    /proc                   proc    defaults        0 0

/dev/sdb/mydata1ext4defaults0 0

2、显示`netstat -tan`命令结果中以‘LISTEN’后跟0个、1个或者多个空白字符结尾的行；

[root@centos10 mydata1]# netstat -tan |grep 'LISTEN[ ]*$'

tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      

tcp        0      0 0.0.0.0:1433                0.0.0.0:*                   LISTEN      

tcp        0      0 ::1:25                      :::*                        LISTEN      

tcp        0      0 :::1433                     :::*                        LISTEN      


完蛋了，换了好几浏览器都报405错误，我都无语了。我改用txt文档上次吧