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Online trainingWith PC-side, Android-screen, camera-recording and live-streaming capabilities, teachers are no longer confined to professional video classrooms for live lectures.Powerful video editing function, easy to make courseware and constantly modify the upgrade.The online classroom realizes the teaching video content in PC, PAD, mobile phone, TV multi-terminal high-definition smooth playback, suitable for a variety of operating systems. Whether live, on-demand or interactive, learners can

runnable (on run queue)S Interrupt SleepingT stop traced or stoppedZ Zombie a defunct ("zombie") process[[emailprotected]~]#psaux|head-5user pid%cpu%memvszrss TTYSTATSTARTTIMECOMMANDroot 10.00.119232 1516?SsAug24 0:01/sbin/initroot20.0 0.000? SAug240:00[kthreadd]root 30.00.0 00?saug24 0:00[migration/0]root40.0 0.000? NBSP;NBSP;NBSP;NBSP;SNBSP;NBSP;NBSP;NBSP;AUG24NBSP;NBSP;NBSP;0:00NBSP;[KSOFTIRQD/0]2.9 Set the new file permission to 600chmod NewFile2.10 Copy file/etc/group to user home director

immature realization of the students#!/bin/bashb=/$PWD/wang.txtecho-n "PLASENBSP;INPUTNBSP;IPNBSP;: readaif[ $a == 192.168.1.11 ] thencat $b |grep $a |awk -f ' ' ' {print$2} ' elif[ $a == ' 192.168.1.21 ' ]thencat $b |grep $a |awk-F ' ' ' {print$2} ' elif[ $a == "192.168.1.31" ]thencat $b |grep $a |awk-F ' ' ' {print$2} ' elseecho "Plaseinputthecorrectip address "NBSP;AMP;AMp;exit1fi Tip: Let's see where the problem is. Scripts are not generic.----------old boy teacher improved afte

Reference answer 1.ping Baidu or a URL-check for DNS issuesPing www.baidu.com2. Couldn ' t resolve host or Unkown host error appearsThere is no way to resolve the domain name to an IP addressHow Ping 223.5.5.5----dns guilty--there's a problem--you're not configuring it.Modify the DNS configuration toPing 223.5.5.5--If it doesn't work-please continue3. See if there is a problem with the gatewayRoute-n # #查看当前正在使用的网关Ping Gateway # # #查看网关是否有问题Troubleshooting process Plots650) this.width=650; "src=

TopicSee the following script:#!/bin/bashgrep oldboy/etc/passwd >/dev/nullreval=$?if [$REVAL-eq 0]then echo "Oldboy user already exists" else Useradd OldboyfiThe above is a very simple creation of the corresponding user shell script code, is this simple script code can be more simple?Reference Answer:#!/bin/bashif grep-q oldboy/etc/passwdthen echo "Oldboy user already exists" else useradd OldboyfiUser answer:[' grep oldboy/etc/passwd|wc-l '-eq 1] echo OK | | Echo NoNoteToday is a day to accompan

Title: Add 20 users in bulk, username user1~20, password is 5 random characters (requires no Shell loop statement)WorkaroundMethod 1Echo User{1..20}|xargs-n1|sed-r ' s# (. *) #useradd \1 \\ echo \1 >>/tmp/passwd.txt \\ Echo $RANDO M |md5sum |cut-c 1-5>>/tmp/passwd.txt \\ echo ' tail-1/tmp/passwd.txt ' |passwd--stdin \1#g ' |bashMethod 2Echo User{1..20}|xargs-n1|sed-r ' s# (. *) #useradd \1 \\ pass= ' echo $RANDOM |md5sum |cut-c 1-5 ' \\ ech o $pass |passwd--stdin \1 \\ echo \1 $pass >>/tmp/user_

Answer reference:1. Clone virtual machine, shut down virtual machine before cloning2, after cloning the network card problem resolution, which needs to modify the HWADDR and UUID/etc/sysconfig/network-scripts/ifcfg-ens32UUID acquisition: With the command nmcli con show getsMAC address acquisition: From the properties of the virtual machineNoteToday is the 97th Day of the day to accompany you and look forward to your progress .For questions and answers, please leave a comment in the blog comments

Answer:To view the system time using the date commandView current time zone, +0800 East Eight (geographical knowledge, not explained)[Email protected] ~]# Date-rsun, 2017 23:39:06 +0800If it is not China time zone, fix method: CentOS6:Cp/usr/share/zoneinfo/asia/shanghai/etc/localtimeCentOS7:Timedatectl Set-timezone Asia/shanghaiNoteToday is the 104th Day of the day to accompany you and look forward to your progress .For questions and answers, please leave a comment in the blog comments section .

Method 1: Normal thinking versionfind/usr/local/-type f-name "*.sh" |xargs chmod +xchmod +x ' find/usr/local/-type f-name "*.sh" ' find/usr/local/-ty PE f-name "*.sh"-exec chmod +x {} \;However, this method is not rigorous, because some scripts do not end in. Sh.Method 2. Exact methodUse the file command to view the types of files, filter out the containing shell script and grant X permissions through awk, sed, grep.find/usr/local/-type F |xargs file |awk-f: '/shell.script/{print $} ' |xargs chm

. Students in schoolPython has been classified as a high school computer learning course, for today's college students, more free time, learning Python programming language in bridging the relevant skills, but also to master a new skill, for future work more helpful.V. Java developersCompared to Java,python in the past two years more popular, many Java developers aimed at this market, transformation to do python, can more easily get a high-paying career!Of course, the above only listed a few kin

/proc/cpuinfo ')>>> Print Outputprocessor:0Vendor_id:authenticamdCPU family:21... ...>>> Print Status0Note 1: The return value returned by using this method under Unix-like systems (status) is not equal to the return value after execution of the script or command, because the reason for calling Os.wait () is to understand the implementation of the system wait (). You need the correct return value (status), just move the return value to the right 8-bit operation.Note 2: subprocess is recommended

currently visible content in the windowOffsetleft: Gets the object relative to the layout or by theScrollTop: Sets or gets the distance between the top of the object and the top of the visible content in the windowThe OffsetTop property specifies the top position of the calculated parent coordinateThe height of the parent coordinate specified by the OffsetParent propertyThe OffsetParent property specifies the parent coordinate of the computed left positionEvent.clientx horizontal coordinates of

] ~]$ str=123 (STR=ABC) echo $STR 123with the above case, the variable assignment in the () cannot modify the value of the previous variable, and also produces the child shell4. execute a command with a pipeline in the parent shell[[Email protected] ~] $STR =123| Str=456;echo $STR 123print variables in a child shell[Email protected] ~]$ str=123| {Str=456;echo $STR;} 55Wtoday is a day to accompany everyone's first day, look forward to your progress. For questions and answers, please leave a comm

Find the top 3 processes that occupy memory (Command big Storm, see whose commands are most streamlined)Reference Answer: Method One Top sorted by memory column, using > can be moved to sort by memory x highlight Z plus color Method Two Top-a Sorting in memory Method Three Htop can be sorted by memory column with mouse clickNote: Yum installation required (Epel source)# View processes sorted by memory from large to small Method Four [[email

/sysconfig/network-scripts/ifcfg-eth0:1device=eth0:1ipaddr=10.0.0.100 Auxiliary IP(secondary IP address) Auxiliary IP is created and maintainedby the IP command of the Linux system , the IP addr add is created by the secondary IPand cannot be viewed through ifconfig ,but the alias IP created by ifconfig can be viewed in the IP addr show commandDescription: Need to focus on the master ※①. methods for manually configuring aliases for VIPsIP addr Add 10.0.0.100/24 dev Eth0ip addr add

, for example:#include int g; Double h; int foo (void) { → statement list}int bar (int a) { → statement list} int Main (void) { → statement list}6, a function of the statement list if it is long, you can also be divided into groups according to the correlation, separated by a blank line. This rule is not strictly required, usually the definition of a variable to form a group, followed by a blank line, the return statement before the blank line, for example:int Main (void) {

12-2 XSS attack12-3 csrf attack and precautionthe 13th Chapter Xadmin Advanced Development13-1 userprofile Registration and Django Rights Management 113-2 userprofile Registration and Django Rights Management 213-3 Model_ico, read-only sub-fields, default sort settings13-4 Custom list return data, same model register two manager13-5 xadmin Use of other common functions13-6 xadmin inherit Rich text Ueditor113-7 xadmin Integrated Rich Text Ueditor213-8 Excel Import Plugin Introduction14th. Deploy

Ip:portTypeSpeedCountry/area 59.57.125.34:8080HTTP3496,7101,7101Fujian Province Quanzhou Telecom 61.220.83.59:80HTTP130,270,18136Taiwan Province Taipei City 211.152.20.8:80HTTP10,3024,15031Shanghai City Unicom 218.94.25.194:80HTTP100,210,18286Jiangsu Province Nanjing Telecom 218.12.29.11:80HTTP131,9985,10415Shijiazhuang City, Hebei province Netcom 59.120.152.185:80HTTP130,260,20920Hinet,taiwan 202.96.119.221:80HTTP500,991,20749Zhejiang province Jinhua Telecom 210.77.146.40:80HTTP10,30,20389Beiji

don't waste this high education. Certainly, the campus and the society are still different. embarked on the society we may also need more contact with people, learn to survive and life and so on, but also can see a lot of social friends also do not have the ability, many people will be empty, low self-esteem, block, helpless, because many of the ability is to be slowly cultivated, is infiltrated into the bones, Stepping into society may not have good

Tags: filter regular perl regular 0 wide assert one question per dayTopic[email protected] oldboy# cat ip.log 10.0.0.1 oldboy 10.0.0.2 oldgirl 10.0.0.3 bingbing 10.0.0.4 Tingting 10.0.0.4 OldboyPrint the first column of the Oldboy row for the second columnsReference Answer method one: While loopCat Match.shwhile Read line do name= ' echo $line |awk ' {print $} ' if ["$name" = "Oldboy"];then echo $line |awk ' {print $} ' fi done Method Two: grep[Email protected] oldboy]# Grep-po "\s+\s (? =oldboy