PortalMain topic:Defines a number that contains only the number 8 as the lucky numberGiven positive integer l, find the smallest lucky number in all multiples of lAlgorithm ideas:Set the final answer to x 8, then x Meet (10X-1) *8/9≡0 (mod L)Simplification: 10x≡1 (mod n), where N=9L/GCD (9l,8)This is a discrete logarithm problem with the following solution:If GCD (10,n) >1, no solutionIf GCD (10,n) = 1, by
http://china.rs-online.com/web/p/usb-cable-assemblies/7244143/Product Details USB3.0 AdapterSuperSpeed USB will provide 10x data conversion rate high-speed USB, as well as improve power efficiencyUSB3.0 Cable provides a durable, high-quality connectionFast transfer speed between storage devices and peripheralsProvides a throughput of up to 4.8Gbps for USB3.0 hosts and devices, with excellent 10x capabilitie
polling implemented in Python. this didn't scale that well and scaling this short term meant implementing polling in a C server. see my post for more: Fast polling using C, memcached, nginx and libevent
after hitting limits with polling in C We calculated different comet solutions, but most of them were and still are very immature. so we implemented our own comet solution using Java and netty (a java. NIO network library ). see my post for more: plurk comet: handling of 100.000 + open connec
there are two numbers x and y, and their modulo n is the same remainder, then when you search for k + 1 decimal numbers composed of 0 and 1, X and Y are extended to four numbers: 10x, 10x + 1, 10y, 10y + 1. Because X and Y are the same (they can be considered equal), 10 X and 10 y are the same, and 10 x + 1 and 10 y + 1 are the same. That is to say, the subtree extended by Y and the subtree generated by X
while true7 break: jump out of the current loop (the loop that executes the break statement)8. Continue: jump out of this loop (the rest of the current loop is still executed)9. Command# Classic_set.sh
Version = classicPS1 = "classic>"
# Lastest_set.sh
Version = lastestPS1 = "lastest version>"
Execute Command$ ../Classic_set.shClassic>Classic>. lastest_set.shLastest version> echo $ versionLastestThrough this experiment, I think it seems that the command can be executed instead of/bin/sh.10. In
, ' A ', ' B ']l2=[' Abd ']Print (L1 > L2)Print (L2 > L1)Assignment Operationsx=10X=x+1X+=1Print (x)X/=3 X=X/3Print (x)x=10X%=3 #x =x%3Print (x)Logic andAge=input (' You Christina geometry >>: ')Age=int (age)Age=int (Input (' You Christina geometry >>: '))Sex=input (' Your gender is >>: ')Print (age > and sex = = ' female ')logical OR ORAge=int (Input (' You Christina geometry >>: '))Sex=input (' Your gende
loading)Umount [-l][partition] Unload mount-L is expressed as mandatoryworth knowing usage: Mount--bind/home//mnt/The/home/is attached to the/mnt/below, equivalent to the establishment of a soft link, delete/home/this "soft link" will expireThird, VIM editorWhen opening a file, vi +10 filename, move the cursor to line tenth of the fileLook at the line number, with Set Nu; cancel this, use set Nonu1. General modeCommon shortcut keys:Copy: "yy", "10yy"Paste: "P", "5p"Delete/Cut forward: "X", "
is to delete a character (equivalent to [backspace], which is the backspace) (common)
NxNx
N is a number that continuously deletes n characters backwards. For example, I want to continuously delete the 10 characters after the cursor, "10x".N is a number that continuously deletes the n characters preceding the cursor. For example, I want to delete the 10 characters before the cursor, "10X
.
L
The cursor moves to the first character of the line at the bottom of the screen,l you write it down as the last abbreviation.
G
Move to the last line of this file (common)
NG
N is a number. Move to the nth row of this file. For example, 20G will move to line 20th of this file.
Gg
Move to the first line of this file, equivalent to 1G Ah! Common
Second, delete, copy, paste, revoke
X, X
In on
always forget to open it, LED does not normally light up.
Section II: View the wireless router basic information
Now all we have to do is look at the default IP address, username, and password for the wireless router.
View the wireless router basic information
IP address, user name, password these basic information is generally written in the wireless router at the bottom of the nameplate, the default IP address is generally 192.168 1.1, the default username and password are g
Services, network connection Management Services, HTTP Transport encryption services, are back on.
22 computer software started successfully, the phone has been getting IP
WIN7 can be a different encryption method to try.
23-compatible wireless network card
Atheros ar5xxx/ar9xxx cards; Driver version 8.0.0.238;
Broadcom 4310-series (in many Dell laptops);
Broadcom 4321ag/4322ag/43224ag WLAN Adapter; Driver version 5.60.18.8 (here);
D-link airplus G dwl-g510 Wireless PCI adapter;driver ve
Atheros ar5xxx/ar9xxx cards; Driver version 8.0.0.238;
Broadcom 4310-series (in many Dell laptops);
Broadcom 4321ag/4322ag/43224ag WLAN Adapter; Driver version 5.60.18.8 (here);
D-link airplus G dwl-g510 Wireless PCI adapter;driver version 3.0.1.0;
D-link DWA-140 rangebooster N USB adapter;driver version 3.0.3.0;
Dell 1510 Wireless N adapter; Broadcom version;driver 5.60.18.8;
Intel 5100/5300; WiFi Link 1000 BGN; Driver version 13.0.0.107;
Linksys dual-band wireless-n USB network Adapter
key. For ordinary users, it is not necessary to understand the concept of SSID and security key to achieve a secure connection, and the user's security key can not be cracked by outsiders, because it is randomly generated, and most importantly, users do not have to memorize lengthy wireless encryption password, avoid the trouble of forgetting passwords.
Insufficient
As described in the previous article, WPS is an optional certification project launched by the Alliance of WiFi organizations, s
. Because generally speaking, the smaller the office size, the fewer users, the lower the risk faced.
As a result, simple packet-filtering firewalls are sufficient for small offices, such as those that are randomly brought by many DSL or cable routers. These include broadband routers from companies such as D-link, 3Com, Netgear and Linksys. In addition, WatchGuard Firebox Soho, Symantec Firewall 100, global technology company Gnat, NetScreen and Sonic
density coverage, so that different data and video and audio files can be transmitted on the whole network.Provides M-bandwidthAP devices in this program use the WG602 of the American Mesh, which operates in the frequency band of the 2.4 GHZ and can be covered within the diameter m by the rate of Mbps in the room. The M bandwidth enables the user not only to transmit the ordinary data packet, also may transmit the video and the audio and so on multimedia file, provides the foundation for the wi
). However, Viehbock says, most users can't tolerate such a long wait time. A typical identification takes only 1-3 seconds. A clever hacker will also take some steps to reduce this time.
Suppose an identification process takes 1.5 seconds. With a maximum of 11,000 identification, the hacker may gain access for approximately 4.5 hours or less (perhaps nearly 2 hours). In the coffee shop or on many other occasions, two hours will certainly not attract the attention of others. As its name implies
. In half, passwords that are less than 8 characters are considered to be easily cracked. can use 10, 12 characters as the password, 16 of course better. It's safer to keep your password as long as possible without being too long and difficult to type.
2, do the Border protection
Not all security issues occur on the system desktop. Using an external firewall/router to help protect your computer is a good idea, even if you have only one computer.
If you're looking at the low end, you can buy
With the upgrade of routing technology, the function of wireless router is also increasing, here mainly analyzes the function of wireless router DD-WRT, the latest 54M wireless router Netgear KWGR614, not only with two 2 DBI detachable antenna, expanded memory, the biggest feature is to support the DD-WRT function, users can brush their own driver, so that this product can play more functions.
Since the KWGR614 Software Based on Linux kernel, enthusia
manage your vrouters and can only initialize them with a toothpick.
◆ If a new computer or mobile phone needs to access the network, access 192.168.1.1 through the computer and configure the MAC access list. Access the management page of the 2nd routers through 192.168.1.99.
The above test of the wireless router relay function is the netgear router-WGR614V9. Of course if you only have one router, the encryption method directly choose WPA2-PSK (AES),
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