dd file extractor

Pattern matching using extractor: When an instance of a class is followed by parentheses using a list of 0 or more parameters, the compiler invokes the applied method on that instance. We can define both objects and classes. As mentioned above, the purpose of the Unapply method is to extract a particular value from what we are looking for. It operates in the opposite way as apply. An extract object that compares the Unapply method in a matching statem

This article explains how to create a file in linux: dd. Use the dd linux Command to create a certain size file. Linux File Creation command: dd command Copy the specified input file to

[Switch] use dd tool to back up data reposted from 9812658 final edit 9812658 I. Introduction to dd commandsDd is a very useful command in Linux/Unix. It is used to copy an object with a specified size block andAt the same time, the specified Conversion========================================================== ======================================Ii. dd

Linux tips-use dd to generate a file of the specified size, linuxddDuring testing or debugging, we sometimes need to generate a file of a certain size. For example, when testing the storage system, we need to reduce the remaining disk space by 5 GB, the simplest way is to copy a 5g file, but where can we get a

Linux tips-use dd to generate a file of the specified sizeDuring testing or debugging, we sometimes need to generate a file of a certain size. For example, when testing the storage system, we need to reduce the remaining disk space by 5 GB, the simplest way is to copy a 5g file, but where can we get a

Linux DD command parameters and usage details---Copy a file with a block of the specified sizeDate: 2010-06-14 click: 3830 Source: Unknown share to: The Linux dd command uses a detailedMain options for DD:Specify the number of digits at the end of the following character multiplied by the corresponding number:b=512, C=1, k=1024, w=2, Xm=number mif=FileEnter a

In Linux, the simplest way to create a specific size file using the dd command is to use the dd command. Dd if = "inputFileName" of = "outFileName" bs = "block size" count = "Block quantity" the block size can be measured in bytes (1B)-c (2B) -w block (512B)-B kilobytes (1024B)-k MB (1024 K)-M gib (1024 M)-G example:

This article explains how to create a file in Linux: dd. Use the DD Linux Command to create a certain size file. Linux File Creation command: dd command Copy the specified input file to

Disk management, mounting a disk, attaching a disk image file, mounting a USB flash drive, umount command, dd 1 mount Command Format: Mount [-t vfstype]-o options device dir Where: *-T vfstype specifies the type of the file system, which is usually not required. Mount automatically selects the correct type. Regular Use types: CD or CD image: iso9660 DOSfat16

1, use df-h , check the current disk[Email protected] ~/$DF-hfilesystem Size used Avail use%mounted on/DEV/SDA1 119G 79G 34G -% /None4.0K0 4.0K0%/sys/fs/Cgroupudev7.8G 12K7.8G1% /Devtmpfs1.6G1.1M 1.6G1% /Runnone5.0M 0 5.0M 0%/run/Locknone7.9G1.5M 7.9G1%/run/Shmnone 100M3.7M97M4%/run/user2. After inserting the U-disk, use df -H to check.[Email protected] ~/$DF-hfilesystem Size used Avail use%mounted on/DEV/SDA1 119G 79G 34G -% /None4.0K0 4.0K0%/sys/fs/Cgroupudev7.8G 12K7.8G1% /Devtmpf

Fix for Linux file system error Ddrescue replace DD Recovery software backup Super blockA recently processed Linux server power outage causes the file system to not read and write, the data is not availableExample, now summarizes the Linux file system error repair method.EXT3-FS error (device Hda3) in Start_transaction

to use a sub-shell, as shown below: [Root @ web186 root] #(Time find.-Name "mysql. Sh") 2> 2.txt./Work186/SMS/bin/MySQL. Sh./Work186/SMS/src/scripts/MySQL. Sh./Work186/SMS/src/scripts1/MySQL. Sh./Work186/sms1/bin/MySQL. Sh./Work186/sms1/src/scripts/MySQL. Sh./Temp/SMS/bin/MySQL. Sh./Temp/SMS/src/scripts/MySQL. Sh[Root @ web186 root] #Cat 2.txt Real 0m0. 083 sUser 0m0. 040 sSys 0m0. 020 s[Root @ web186 root] # The second method also succeeded. In summary, it is (Time command-line) 2>

Linux file system swap swap partition and DD command details (3)1. Create swap partition: Partition type 82 is equivalent to virtual memory in WindowsMkswap/dev/sda5 creating a Swap partition file system region-L label create label for swap partitionSWAPON/DEV/SDA5 enable the specified swap partition-A: Enable all swap partitions defined in the/etc/fstab

1, the implementation of DD backup:Using gzip compression:DD If=/dev/hdb | gzip >/local/path/image.gzDescription:/dev/hdb is a hard consolidation disk. On different hard drives, may be/dev/sda or other. Before the backup, use the sudo fdisk-l command to see which file the hard disk is.。 Image.gz is the backup image file.2. Recovery of Backup:If there are catastro

DD1. RoleThe DD command is used to copy the file and convert and format the data according to the parameters. 2. FormatDD [Options]3.[opitions] Main parametersbs= bytes: Forced ibs= and obs=. cbs= Bytes: Each conversion is specified. conv= Keyword: Converts a file based on a comma-delimited representation of a keyword. count= Number of blocks: only the specified

This command notifies the system to replicate data from the underlying, not through the file system.If source file of target fileBS Specifies how much data is copied each time during the copy processCOUNT specifies how many times (each BS data amount) is copied during the copy processThe second operation is just a copy of the source file part of the contentCopy D