Computer startup
Disk partition Table MSDOSMBR and Gptguid partitiontable
1 MBR partition table
2 GUID partition TABLEGPT partition table
Multiple system Boot
BIOS and UEFI
1. Computer startupWhen we install multiple systems on a single host (such as Win7 and Ubuntu14.04), we will encounter problems with which system is booting up. The typical scenario here is to install Ubuntu First, and then install Win7, and there will be a problem w
network, memory, and so on. These are necessary for running the kernel, and in order to achieve a specific target, the bootstrapper can set the kernel based on configuration parameters or input data.Android bootloader can be \bootable\bootloader\legacy\usbloader found in.The traditional loader contains a file that needs to be explained here:
Init.s Initialize the stack, clear 0 BBS segment, call MAIN.C's _main () function;
MAIN.C Initialize the hardware (alarm, motherboard, keyboar
to turn this job into a foreground job run. But what happens if background jobs are output to the control terminal? We can prohibit this situation by stty order. At this point, the terminal driver sends a SIGTTOU signal to the background job to block its process, and of course we can also use FG to move it to the foreground.Daemon ProcessThe daemon (daemon) often starts when the system boots and terminates when the system shuts down. Because the daem
programs. 2. Remote CopyOS x provides an SSH-based remote copy command SCP, which is provided by most Linux and Unix systems, and it is easy to copy files securely between two machines, with the following commands:SCP./testfile.txt [Email protected]:/tmpYou will be asked to enter the username password after the carriage return, only the testfile.txt in the current directory will be copied to the TMP directory of the other machine.SCP [email protected]:/tmp/testfile.txt./Copy from remote to loca
') Logger.error ( ' error message ') logger.critical ( ' critical message ') ' ##### dictionary configuration interested child boots can be written using ' logging.config.dictConfig (config) ' to write an example program sent to me to provide me with a perfect article. ##### Monitor configuration interested child boots can use ' Logging.config.listen (port=default_logging_config_port) ' Write a sample prog
contents of your MBR, use the following command:# dd If=/dev/hda of=mbr.bin bs=512 count=1 # od-xa Mbr.binThis DD command needs to run as the root user, which reads the first 512 bytes of content from/dev/hda (the first IDE disk) and writes it to the Mbr.bin file. The OD command prints the contents of this binary file in 16 binary and ASCII format.(2) Start Grub/liloBoth grub and Lilo are boot loaders. In the simplest sense, the boot loader boot loader boot
short boots. Because large chalk brush is very sensitive to paper lines, especially when gently brushwork, can bring out very vivid particle effect. Therefore, the delicate quality of the Intuos 3 allows large chalk to play to the extreme, and to draw more dynamic texture strokes.
7. Use the tapered Artist Chalk 10 for details processing, drawing more changes.
8. Proper performance of the belt buckle metal texture, pay
. If Iptables is turned on, the following rules are requiredOpen 1723,47 Portiptables -A INPUT -p tcp --dport 1723 -j ACCEPTiptables -A INPUT -p tcp --dport 47 -j ACCEPT
5. Start and stop VPN services#/ETC/RC.D/INIT.D/PPTPD Start#/etc/rc.d/init.d/pptpd Stop off#/etc/rc.d/init.d/pptpd Restart reboot
To enable the VPN service to start automatically when the system boots, execute:# Chkconfig PPTPD on
Use NETSTAT-ANL to see if 1723 ports are open on th
Both grub and Lilo are boot loaders. The boot loader is used to boot an operating system boot. When the machine boots its operating system, the BIOS reads the front 512 bytes (master boot record) on the boot media. Only one operating system boot record can be stored in a single MBR, so there is a problem when multiple operating systems are needed and more flexible boot loader is required.
All boot loaders work in a similar way to meet common goals,
virus, then the main reason is due to Kernel32.dll files are missing or damaged, can be resolved as follows:
Using the Windows XP Setup disk to enter Recovery Console mode, in the command prompt, enter the following command:
CD System32
ren Kernel32.dll kernel32.old (Note: If Kernel32.dll no longer exists, you may not use this command)
Map
Expand E:/i386/kernel32.dl_ (E disk for the drive letter for placing the Windows XP installation disk)
Exit
Q: After I updated the driver for a hardwa
file is the same as/PROC/SYS/VM/BUFFERMEM, but it is a memory-mapped and general cache for files.
Make Kernel settings persistent
A handy utility is provided here to change any kernel parameters in the/proc/sys directory. It allows you to change the running kernel (similar to the Echo and redirection methods used above), but it also has a configuration file that executes when the system boots. This allows you to change the kernel in the run and add t
mode
Boot ROM Monitor Router (boot) > 0x1 operating system version upgrade
ROM Monitor > 0x0 Password recovery
------------------------------------------------------------------
Configuration Register value and its meaning:
------------------------------------------------------------------
Configurationregistervalue meaning
0x2102 default settings.
bit13=0x2000 Flash boot fails 5 times and automatically boots from ROM.
BIT8=0X0100 closes the
/java. Installing Elasticsearch
Elasticsearch can be installed with the package Manager by adding a elastic package warehouse.
Run the following command to import the Elasticsearch public gpg key into RPM:
# https://www.elastic.co/guide/en/elasticsearch/reference/current/rpm.html
rpm--import https:// Artifacts.elastic.co/gpg-key-elasticsearch
Create a file named Elasticsearch.repo in the/etc/yum.repos.d/directory of the Redhat-based release, which includes:
Echo ' [elasticsearch-5.x]
Name=elas
Tags: source code compiled Mysql5.7 version1, source code compilation install MySQL (version 5.7):Https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-boost-5.7.18.tar.gz# (after MySQL from the 5.7 version, boost is required, it is recommended to bring the system's own boost library uninstall, source code compiled to install the high versionBoost Library is for C + + The language standard library provides some of the extensions C + + the generic name of the library )(1) Environment preparation:[[em
Today, the development of a requirement, you need to import the data in Excel into MySQL, originally wanted to import Excel into CSV format automatically has a comma, so with a comma as a delimiter, and then copy the data to a text file using MySQL load is possible, who knows not what I think.
Here's a look at the data form of Excel, the fourth field has a comma, I'm going to go, how to do this:
200005
Gold War
sectors). When the MBR is loaded into RAM, the BIOS will give control to the MBR. extracting information from MBRto view the contents of your MBR, use the following command: # dd If=/dev/hda of=mbr.bin bs=512 count=1 # od-xa Mbr.binthis DD command needs to run as the root user, which reads the first 512 bytes of content from/dev/hda (the first IDE disk) and writes it to the Mbr.bin file. The OD command prints the contents of this binary file in 16 binary and ASCII format. Start Grub/liloboth gr
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been killed colorless tasteless, the appearance and true snow very similar. Since the fake snow was made into pieces, the crew needed to dig up the block of fake snow with a large hoe, which took nearly 1 hours. Due to time constraints, the cast can not be in a short period of time on the ground paved with a large area of "snow", only 00 scattered on the ground to play the daughter left home the last scene, but dressed very fashionable: Zhao Wei as usual comb a ponytail, wearing a knee-like bla
Mem_init function is invoked when the Linux kernel boots. If you need to call this memory somewhere else, you can export the first address of the memory returned by the Alloc_bootmem through Export_symbol, and then you can use this block of memory. The disadvantage of this method of memory allocation is that the code requesting the memory must be used in the code that is linked to the kernel, so the kernel must be recompiled, and the memory managemen
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