Package com; public class test {public static void main (string [] ARGs) {system. out. println (getsteps1 (); system. out. println (">>>>>>>>>>>>>>>>>>>>>>>>>>>>"); system. out. println (test. getsteps (); system. out. println (">>>>>>>>>>>>>>>>>>>>>>>>>>>> ");} public static int getsteps () {// use the minimum public multiple to reduce the number of traversal times. Int I = 1; int step = 2; Boolean maxstep = false; while (true) {system. Out. Print ("
Opencv experiences (1)
The second chapter of learning opencv mainly introduces some common and interesting functions and data types, so that students at the beginning are more interested in image processing, although I do not understand the internal experiment of the function and the meaning of some defined constants, I am still very happy after learning Chapter 2. At least I know some basics of image processing, such as contour processing;
Knowledge
First, the phenomenon
1. See if a process exists
Ps-ef | Grep-v ' grep ' |grep-e ' Shell/cron/bonus/cash '
www 2624 1 0 Oct24? 00:00:35/usr/local/bin/php/data1/www/htdocs/hb.e.weibo.com/v2/www/htdocs/index.php--uri=shell/cron/bonus/cash- -get=proc_num=1proc_total=1--post=
2. View process creation time
Ps-p 2624-o Lsta
Init is one of the most indispensable programs in Linux system operation. Init process, which is a user-level process initiated by the kernel. The kernel will find it in several places in the past that used Init, and its correct location (for Linux systems) is/sbin/init. If the kernel cannot find Init, it will try to run/bin/sh, and if it fails, the boot of the system will fail.Linux 7 RunLevel (0: shutdown, shutdown mode,
This series of articles helps to rationalize the core content of the React framework (jsx/Virtual dom/component/life cycle/diff algorithm/setstate/purecomponent/hoc/...) while implementing a Cpreact project address
Implement React series--JSX and Virtual DOM from 0 to 1
Implement React series from 0 to 1-comp
raid Introduction: RAID (Redundant array of inexpensive Disks) is called a redundant array of inexpensive disks. The basic principle of RAID is to put multiple inexpensive small disks RAID level description; generally used RAID class, Are RAID 0, RAID1, RAID 2, RAID 3, RAID 4, and RAID 5, plus two-in-one raid 0+1
Graphic RAID 0, RAID 1, RAID 5, RAID 10
RAID (Redundant Array of Independent Disk Independent Redundant Disk Array) technology was proposed by the University of California at Berkeley in 1987, initially to combine small cheap disks to replace large expensive disks, at the same time, we hope that when the disk fails, data access will not be damaged and a certain l
this time, the third and fourth disks are idle. When B data is written to the third Disk in a certain band, and B data is checked in the fourth disk, in this way, both data a and data B can be read and written at the same time.
VII. Raid 6
Raid 6 adds a verification area on the basis of RAID 5, each of which has two verification areas. They use an unused verification algorithm to improve data reliability.
Next we will introduce several types of com
CentOS startup level: init 0, 1, 2, 3, 4, 5, 6
This is a long-time knowledge point, but I have been confused all the time. Today I am trying to understand it ..
0: stopped
1: Maintenance by root only
2: multiple users, cannot use net file system
3: more users
Document directory
0: stopped
0: downtime 1: single-user mode, only root for Maintenance 2: multi-user, cannot use net file system3: full multi-user 5: Graphical 4: security mode 6: restart actually, you can view/etc/rc. rc * in d *. d .. Init 0, the corresponding system
data, this data will record the backup data of other disks for rescue when the disk is damaged. Because of the same check code, the total capacity of the RAID5 is reduced by a chunk of the overall disk count.RAID5 only supports the damage of a piece of disk by default. Spare disk preparation capabilities.is one or more disks not included in the original disk array level, this disk is not used by the disk, when there is any disk damage to the disk array, then this piece of spare disk will be act
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data, this data will record the backup data of other disks for rescue when the disk is damaged. Because of the same check code, the total capacity of the RAID5 is reduced by a chunk of the overall disk count.RAID5 only supports the damage of a piece of disk by default. Spare disk preparation capabilities.is one or more disks not included in the original disk array level, this disk is not used by the disk, when there is any disk damage to the disk array, then this piece of spare disk will be act
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