Linux OPS Practice case-December 20, 2015-December 31

1, the creation of a 10G file system, the type of EXT4, requires the boot can be automatically mounted to a separate data/data directory;

[Email protected]/]# cat/proc/partitions

Major Minor #blocks name

8 0 52428800 SDA

8 1 204800 sda1

8 2 4096000 Sda2

8 3 48126976 Sda3

8 10485760 SDB

[Email protected]/]# Fdisk/devsdb

Unable to Open/devsdb

[Email protected]/]# 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'll remain in memory only, until the decide to write them.

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

Warning:invalid flag 0x0000 of partition Table 4 would be a 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, Sectors/track, 1305 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

I/O size (minimum/optimal): 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, Sectors/track, 1305 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x68f6d495

Device Boot Start End Blocks Id System

/DEV/SDB1 1 1305 10482381 Linux

Command (M for help): W

The partition table has been altered!

Calling IOCTL () to re-read partition table.

Syncing disks.

[Email protected]/]# 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

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 would be automatically checked every mounts or

Whichever comes first. Use Tune2fs-c or-i to override.

[Email protected]/]#

[Email protected]/]#

[Email protected]/]# cat/proc/partitions

Major Minor #blocks name

8 0 52428800 SDA

8 1 204800 sda1

8 2 4096000 Sda2

8 3 48126976 Sda3

8 10485760 SDB

8 10482381 SDB1

[Email protected]/]# mkdir/mydata1

[Email protected]/]# mount/dev/sdb1/mydata1/

Mount:you must specify the filesystem type

[Email protected]/]# mount/dev/sdb/mydata1/

[Email protected]/]# cd/mydata1/

[[email protected] mydata1]# ls

Lost+found

[[email protected] mydata1]# ls

Lost+found

[Email protected] mydata1]# CD lost+found/

[[email protected] lost+found]# ls

[Email protected] lost+found]# CD.

[[email protected] mydata1]# ls

Lost+found

[[email protected] 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

[Email protected] mydata1]# Vi/etc/fstab

[Email protected] mydata1]# Cat/etc/fstab

#

#/etc/fstab

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

#

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

# See mans 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, display the ' Netstat-tan ' command results with ' LISTEN ' followed by 0, one or more blank characters end of the line;

[Email protected] 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

Finished, changed several browsers have reported 405 errors, I have no words. I'm using the TXT document last time.

This article is from the "Learning Exchange" blog, please be sure to keep this source http://725689.blog.51cto.com/715689/1729273

Linux OPS Practice case-December 20, 2015-December 31