linux mint 18 3

the symbolic connection of the directory? The reason is that in the Linux system, each file (directory is also a file) corresponds to an inode structure, where the Inode data structure contains the file type (directory, ordinary files, symbolic connection files and so on) information, which means that the operating system can traverse the directory to determine the symbolic connection, Since you can determine the symbolic connection of course, you ca

First, homework (exercise) content:1, elaborated the Linux HA cluster use background;2. Summarize the system composition of Linux ha cluster and the working model of HA cluster;3, through the lamp combination, based on heartbeat V2 CRM implementation ha; requirements, deployment wordpress, any data used in the edited article can be accessed normally after the nod

term function\n"); + } A at intMainintargcChar*argv[]) - { - if(ARGC 3) { -fprintf (stderr,"Usage:%s file [Exit | _exit | return]\n", argv[0]); -Exit1); - } in - //registering the terminating function with a process to atexit (TERM_FUN1); + atexit (term_fun2); - atexit (TERM_FUN3); the *FILE *FP = fopen (argv[1],"w+"); $fprintf (FP,"Hello World");Panax Notoginseng - if(!STRCMP (argv[2],"Exit")) { theExit0);//Library functions for

About linux-fedora 18 (non-virtual machines) Lack of access to IP addresses and the problem of surfing the Internet a few days ago, my laptop suddenly failed to get an IP address. Because I only installed the fedora18 system, I just started playing linux soon, it's an English version! Therefore, you can only find a windows system computer to traverse the entire i

Recently to use, scheduled to send mail features:How to timing, of course, to use the Linux crontab.The current code can only send e-mail, the attachment can be sent in the study, later to fill in1 #!/usr/bin/env python2 3 ImportSmtplib4 fromEmail.mime.textImportMimetext5 ImportThreading6 ImportTime , DateTime7 8mailto_list=[""]#It's the other person's mailbox.9 #-----------QQ Mailbox send settings--------

; #Time kbin pktin kbout pktout 10:32:01 40 58 43 66 10:32:01 27 58 3 32 10:32:02 3 28 9 44 10:32:02 5 42 96 96 10:32:03 5 48 3 28 Installing Collectl # Ubuntu/debian Users $ sudo apt-get install Collectl #Fedora $ sudo yum install Collectl ConclusionThese easy-to-use commands can quickly check network bandwidth usage on

; #Time kbin pktin kbout pktout 10:32:01 40 58 43 66 10:32:01 27 58 3 32 10:32:02 3 28 9 44 10:32:02 5 42 96 96 10:32:03 5 48 3 28 Installing Collectl # Ubuntu/debian Users $ sudo apt-get install Collectl #Fedora $ sudo yum install Collectl ConclusionThese easy-to-use commands can quickly check network bandwidth usage on

One linux Command every day (18): locate command link: One linux Command every day (1): ls command http://www.bkjia.com/ OS /210210/163049.html#linuxlinuxcommand every day (2): cd command serial (3 ): pwd command Export (4): mkdir command http://www.bkjia.com/ OS /201210/1620.3.html#a linuxcommand every day (5): rm com

compression packDownload directly after decompression, get apache-tomcat-8.0.53For brevity, I rename this here to Tomcat8, asHere, Tomcat is installed. In fact, is to download the compressed package, decompression on the line, super simple. Unlike the JDK, the environment variables need to be further configured after decompression.3. Start Tomcat./tomcat8/bin/startup.sh4. Firewall portThe outside machine was unable to access Tomcat because the firewa

location method and principle", which provides a case to help us perform performance positioning.2. vmstat– Virtual Memory Statisticsthe Linux VmStat command is used to display statistics for virtual memory, kernel threads, disks, system processes, I/O blocks, interrupts, CPU activity, and so on. By default, the Vmstat command is not available under the Linux system, and you need to install a Sysstat packa

1738B1810B|23-0310:27:14 2937B2610B|23-0310:27:15 2319B2232B|23-0310:27:16 2738B2508B|23-0310:27:17 18. collectl Collectl reports system statistics in a format similar to dstat. Like dstat, collectl also collects statistics about different system resources, such as processors, memory, and networks. A simple example shows how to use collectl to report network usage/bandwidth. $collectl-sn-oT-i0.5 waitingfor0.5secondsample... # #Ti

to do other operations can be executed to the background to run the command.Job Control Commands:FG [[%]job_num]: The assigned assignment is recalled to the foreground;BG [[%]job_num]: The designated job in the background to start up, let its background silently run, but this job must support running in the background;Kill [%job_num]: terminates the specified job;3, Process priority adjustment:Static priority:The priority is adjusted by specifying th

informationRPM-QL XXX: Querying the files in the packageRPM-QF file Full path name: The package to which the query file belongs18.4 Uninstalling RPM PackagesRPM-E the name of the software packageDetail questions:(1) If other packages depend on the package you want to uninstall, an error message will be generated when uninstalling.(2) If we are to delete this package, you can increase the parameter--nodeps, you can force the deletion, but it is generally not recommended, because the program depe

process does not end, the other threads within the process do not terminate, and the process terminates until all thread ends.The most important problem with thread termination is the resource release problem: Pthread_cleanup_push (), Pthread_cleanup_pop () is used to automatically release resources. Two functions must appear in pairs {}Another issue: Thread synchronization issues.3. Private Data4. Thread synchronization1. Mutual exclusion Lock2. Con

18 Common commands for monitoring network bandwidth on a Linux serverThis article describes some of the Linux command-line tools that you can use to monitor network usage. These tools can monitor data transmitted over a network interface and measure the speed at which data is being transmitted. The inbound traffic is displayed separately from the outbound traffic

access from 172.16.0.0/16 (which can be set according to their network conditions);Second, completion time:Before October 24, 2015.Third, the way of submission:Please submit your job's post link address in the form of a comment blog.Formats such as:Student number + name http://mageedu.blog.51cto.com/4265610/1687589This article is from the "Marco Education Linux operation and maintenance training" blog, please make sure to keep this source http://mage

... # ----------Network----------> #Time kbin pktin kbout pktout 10:32:01 40 58 43 66 10:32:01 27 58 3 32 10:32:02 3 28 9 44 10:32:02 5 42 96 96 10:32:03 5 48 3 28 Installing Collectl # Ubuntu/debian Users $ sudo apt-get install Collectl #Fedora $ sudo yum install Collectl ConclusionThese easy-to-use commands can quickl

First, the editing modeCommand-line modeWhen replacedIf there is a/symbol in the character you want to replace, you can change the delimiter to # or @：1,100s#/good/weer/#well#gReplace the/good/weer/in the first 100 rows with the well，: Nohl highlighting when you cancel a search，: X is also saved and exited, but if the file contents are not changed, Wq will modify the MtimeX does not modify MtimeVim ExercisesCp/etc/dnsmasq.conf/tmp/1.txt(1) Move Down, right, left, and up 6 characters (6j 6l 6h 6k

CentOS is divided into CD version and DVD version, CD version of the file too many, recommended download DVD version: http://www.centoscn.com/1. Open VMware, then right-click on the previously created virtual machine and select settings:To the next interface, select CD/DVD (IDE):2. Click Browse to locate the CentOS image file in the current host:3. General installation of CentOS 6.5 with the first DVD, not the second DVD, so directly click OK, this is

Tags: 20.5 logical judgment in shell scripts 20.6 file Directory Properties Judge 20.7 if special usage 20.8/20.9 case judgment20.5 logical judgments in shell scriptsFormat 1:if condition; Then statement; FiFormat 2:if condition; Then statement; else statement; FiFormat 3:if ...; Then ...; Elif ...; Then ...; else ...; FiLogical judgment Expression:If [$a-gt $b];If [$a-lt 5];If [$b-eq 10]-GT (>); -lt (can use | | Combine multiple conditionsIf [$a-gt