can t get on youtube

$link =mysqli_connect ("localhost:3306", "root", "root", "supermarket");if (! $link) { echo "The reason for the connection failure is:". Mysqli_connect_error ();}Mysqli_query ($link, "Set names UTF8");$sql = "SELECT * from goods";$a =mysqli_query ($link, $sql);while ($res =mysqli_fetch_assoc ($a)) { $arr []= $res;}Delete $link =mysqli_connect ("localhost:3306", "root", "root", " Supermarket "); if (! $link) { echo "Connection failed because:". Mysqli_connect_error (); } Mysqli_

Logical judgments in shell scriptsFormat 1:if condition; Then statement; FiIf a>3, output OK#!/bin/basha=5if [ $a -gt 3 ]then echo okfiFormat 2:if condition; Then statement; else statement; FiIf the a>8 output is OK, the output nook[[emailprotected]]# vim if1.sh#!/bin/basha=5if [ $a -gt 8 ]then echo okelse echo nookfiFormat 3:if ...; Then ...; Elif ...; Then ...; else ...; Fia=5if [ $a -gt 1 ]then echo ">1"elif [ $a -lt 6 ]then echo "Logical judgment expression: if [$a-gt $b]; If

;Val= ' expr $a + $b ';echo "A + B: $val";Val= ' expr $a-$b ';echo "A-B: $val";Val= ' expr $a \* $b ';echo "A * B: $val";Val= ' expr $b/$a ';echo "b/a: $val";val= ' expr $b% $a ';echo "B% A: $val";if [$a = = $b]Thenecho "a equals B";Elfi [$a! = $b]Thenecho "A is not equal to B"Fi#!/bin/basha=10;b=20;echo "a+b= $ ((a+b))";echo "a-b= $ ((a))";echo "a*b= $ ((a*b))";echo "B/a= $ ((b/a))";echo "a%3= $ ((a%3))";2. Relational operatorsRelational operators only support numbers, and strings are not suppo

] ~]# Expr 10 \* 3[[email protected] ~]# Expr 1 + 2[[email protected] ~]# expr 3-1[Email protected] ~]# expr 3?? #取余数 operation? $ (): The output of the command, as a parameter[[Email protected] opt]# Date[Email protected] opt]# date +%f[Email protected] opt]# cd/opt[Email protected] opt]# mkdir? $ (Date +%f)[[email protected] opt]# ls[Email protected] opt]# mkdir? mydir-$ (Date +%f)[[email protected] opt]# ls[Email protected] opt]# mkdir? mariadb-$ (Date +%f)[[email protected] opt]# ls[Email pr

$ (): The output of the command, as a parameter[[Email protected] opt]# Date[Email protected] opt]# date +%f[Email protected] opt]# cd/opt[[email protected] opt]# mkdir $ (date +%f)[[email protected] opt]# ls[Email protected] opt]# mkdir mydir-$ (date +%f)[[email protected] opt]# ls[Email protected] opt]# mkdir mariadb-$ (date +%f)[[email protected] opt]# ls[[email protected] opt]# mkdir $ (hostname)-$ (date +%f)#######################################################Common Test Options? Check fi

. ============================================ Taskkill [/S system [/u username [/P [Password]{[/FI filter] [/PID processid |/IM imagename]} [/F] [/T] Description:This command line tool can end at least one process.You can end a process based on the process ID or image name. Parameter List:/S system specifies the remote system to connect. /U [domain/] User specifies the user ContextRun this command. /P [Password] specifies the user context providedPassword. If this parameter is ignored, a prom

] # Cat onUser = "$1"If who | grep "^ $ user"ThenEcho "$ user is logged on"Fi[Root @ localhost test01] # chmod + X on[Root @ localhost test01] #./on RootRoot tty1 2010-04-22 14: 46 (: 0)Root pts/0 2010-04-22 14: 54 (: 0.0)Root is logged on[Root @ localhost test01] # P8[Root @ localhost test01] # X1 = "005"[Root @ localhost test01] # ["$ X1" = 5][Root @ localhost test01] # echo $?1[Root @ localhost test01] # ["$ X1"-EQ 5][Root @ localhost test01] # echo $?0[Root @ localhost test01] # P11[Root @ l

| unknownImagename EQ, ne image namePid eq, NE, GT, LT, GE, le PID ValueSession EQ, NE, GT, LT, GE, le session number.Cputime EQ, NE, GT, LT, GE, le CPU time, format:Hh: mm: Ss.Hh-hour,Mm-min, SS-SecMemusage EQ, NE, GT, LT, GE, and Le memory usage, in KBUsername EQ, ne username, in the format of [domain \] userModules

image namePid eq, NE, GT, LT, GE, le PID ValueSession EQ, NE, GT, LT, GE, le session number.Cputime EQ, NE, GT, LT, GE, le CPU time, format:Hh: mm: Ss.Hh-hour,Mm-min, SS-SecMemusage EQ, NE, GT, LT, GE, and Le memory usage, in KBUsername EQ, ne username, in the format of [domain \] userModules EQ, ne DLL nameServices E

Partial Differential Equation numerical solution --- learning Summary 1. Knowledge Review (Note: \ (\ mit V \) is a linear space) Inner Product $ (\ cdot, \ cdot): \ mit V \ times \ mit V \ longrightarrow \ r $ is a bilinear ing that satisfies \ (I) (u, v) = (V, u), \ forall \, U, V \ In \ mit V \); ? $ (II) (u, u) \ GE 0, \ forall, U \ In \ mit v $; \ (III) (u, u) = 0 \) only when \ (u = 0 \). Semi-norm \ (| \ cdot |: \ mit V \ longrightarrow \

; =" Return Ge;""=" Return eq;"! = "Return ne;"" Return and;"|" Return or;"While" return while;"If" return if;"Else" Return else;"Print" Return print;[/T/N] +;/* remove spaces and press ENTER */. Printf ("unknow Symbol: [% s]/n", yytext );%Int yywrap (void ){Return 1;} [Note] the Lex file here is relatively simple.C. lexya_e.y 001% {002003 # include 004 # include 005 # include 006 # include "node. H"007008/* attribute operation type */009 node * OPR (

) # 10 bytes long[System.Web.Security.Membership]::GeneratePassword(8,2) # 8 bytes long Check the current backup on multiple servers In my environment, I have two database configurations and the backups are not always placed in a standard location. Therefore, I used the "Brute Force" solution to check backups. # Checking backups are currentwrite-host ''write-host 'ServerName'get-childitem \\ServerName\ShareName\dump_data\*.bak | where-object { $_.LastWriteTime -

\] User specifies the user context in which the command should be executed. /P [Password] specifies a password for the provided user context. If this parameter is ignored, a prompt is displayed. /FI filter apply filter to select a group of tasks. "*" Is allowed "*". For example, the image name EQ Acme */PID processid specifies the PID of the process to be terminated. Use tasklist to obtain the PID. /IM imagename specifies the image name of the process to be terminated. The wildcard '*' can be u

terminate. The wildcard '*' can be used to specify all image names./T tree kill: Terminate the specified process and any sub-processes that are started from this process./? Show Help/usage.Filter:Valid value of the filter name Operator----------------------------------------Status EQ, run by ne | no responseImagename EQ, ne image namePid eq, NE, GT, LT, GE, le PID ValueSession EQ, NE, GT, LT, GE, le sessio

Today is April 1. On this great and grand day, Google launched a great stuff: Google bird watching-building the world's largest shanzhai information network. URL: http://www.google.cn/intl/zh-CN/google_pigeon/index.html Watching global information allows everyone to copy and benefit from it! Here is a question about how to protect privacy: Google promises that Gu Ge will only fly over the public area and can only perceive what birds can perceiv

Preface Yesterday I learned the abstract factory model. The so-called abstract factory model is designed to cope with product line upgrades and isolation platform differences. For details, refer to the previous blog of the blogger. Today we want to learn the template method model. It can be said that this model is too simple and very simple. You only need to glance at it to know its true meaning and its essence. In a word. Body 1. Definition Defines the framework of an algorithm in an operati

Verify IP addresses using Shell Regular Expressions This article mainly introduces the Shell regular expression to verify IP addresses. This article provides multiple methods and provides implementation code respectively. For more information, see Multiple IP addresses in the Local Machine The Code is as follows: Ifconfig | awk '/inet/{print $2}' | awk-F: '{print $2 }' First, use this The Code is as follows: CheckIPAddress () { Echo $1>/tmp/tmpserverip Echo $1 | grep "^ [0-9] {1, 3 }. [0-9] {1,

| UNKNOWNIMAGENAME eq, NE image namePID eq, NE, GT, lt, GE, le PID valueSession eq, NE, GT, lt, GE, le session number.CPUTime eq, NE, GT, lt, GE, le CPU time, formatHh:mm:ss.HH-When,MM-min, ss-SecMemusage eq, NE, GT, lt, ge, le memory usage, in kilobytesUSERNAME eq, NE user name, in the format [domain\]userMODULES eq,

. /T terminates the specified process and any child processes which were started by it. Terminates the specified process and all its child processes/F Specifies to forcefully terminate the process (es). Force terminate process/? Displays this help message. Filters:filter Name Valid Operators Valid Value (s)-------------------------------------- -------------STATUS eq, ne RUNNING | Not Responding | UNKNOWN IMAGENAME eq, ne Image name pid eq, NE, GT, l

/** Print out all the "daffodils", the so-called "Narcissus number" refers to a three-digit number, their respective numbers* Cubic and equals the number itself. For example: 153 is a "narcissus number", because the 153=1 three-time Square +5* Three times +3 of the three parties.*/public static void Main (string[] args) {int j = 0;int I, k;int bai,shi,ge;for (i = 100;i Bai = i/100;Shi = (I/10)%10;GE = (i%10