tripwire ops

First, homework (exercise) content:1. Summarize rpm and Yum to implement the package management function.Requirements: Homework to be illustratedSecond, completion time:Before September 15, 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

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://mageedu.blog.51cto.com/4265610/1704128Linux

lines in two files and their blank lines;(3) Show the total number of files in two files and their total number of rows;9. Write a script(1) Prompt the user to enter a string;(2) Judgment:If the input is quit, exit the script;Otherwise, the string content of its input is displayed;10, write a script, print 2^n table; n equals the value entered by a user; (Sorry, I'm naughty)11, write a script, write a few functions: function 1, to achieve the sum of two numeric values, function 2, take a given

Here are some of the shells I've compiled and used for many years to share with you. Speaking of automation operations many people will talk about puppet, ansible,saltstack these tools I have used, and eventually gave up. The early configuration of these tools is too time-consuming, expansion is not convenient, suitable for dummies operation, for more than 15 years of experience in software development I like, free, arbitrary. Eventually I chose to maintain the shell myself, modular the shell an

1px solid;background:url ("/e/u261/lang/ Zh-cn/images/localimage.png ") no-repeat center;border-top: #ddd 1px solid;border-right: #ddd 1px solid;" Src= "/e/u261/ Themes/default/images/spacer.gif "width=" 553 "height=" 131 "alt=" Spacer.gif "/>The monitoring of this device is added TreeGraph Trees-------Default Tree---------Add------650) this.width=650, "style=" Border-bottom: #ddd 1px solid;border-left: #ddd 1px solid;background:url ("/e/u261/lang/ Zh-cn/images/localimage.png ") no-repeat cente

) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/79/BD/wKioL1aaFgyzqgUwAAAhpWUiLqI409.png "style=" float: none; "title=" 7.png "alt=" Wkiol1aafgyzqguwaaahpwuilqi409.png "/>7 , one day the system was invaded, hackers in your system to leave the Trojan file:You now need to find all the files on the current system that are not owned by the master or group and have been visited in the last week;In addition, it is necessary to find all files of more than 20k and type ordinary files in/etc dire

= "Wkiom1aliz2zxaaaaaanlsds7_o489.png"/> 6 Find all files that are not root, bin, or Hadoop under the/usr directory; 650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M02/79/34/wKioL1aLgezCdoiXAAAFwFYBvWM900.png " Title= "7.png" alt= "Wkiol1algezcdoixaaafwfybvwm900.png"/> 7, one day the system was invaded, hackers in your system to leave the Trojan file:You now need to find all the files on the current system that are not owned by the master or group and have been vis

base name; Further use Egrep to remove its directory name (note(1)directory name, not directory path);(1)echo/etc/rc.d/init.d | egrep-o "[^/]+/?$"(2)echo/etc/rc.d/init.d | egrep-o "/.*/"6. Find all files that are not root, bin or hadoop under the/usr directory;find/usr-not-user root-a -not-user bin-a-not-user hadoop 7, one day the system was invaded, hackers in your system to leave the Trojan file:you now need to find all the files on the current system that are not owned by the master or grou

+found[[email protected] mydata1]# DFFilesystem 1k-blocks used Available use% mounted on/dev/sda3 47371632 1628584 43336700 4%/Tmpfs 510148 0 510148 0%/dev/shm/DEV/SDA1 198337 26862 161235 15%/boot/dev/sdb 10321208 154100 9642820 2%/mydata1[Email protected] mydata1]# Vi/etc/fstab[Email protected] mydata1]# Cat/etc/fstab##/etc/fstab# Created by Anaconda on Wed Dec 9 01:17:20 2015## Accessible filesystems, by reference, is maintained under '/dev/disk '# See mans Pages Fstab (5), Findfs (8), mount

underlined) followed by a set of parentheses line;# Cat/etc/rc.d/init.d/functions | Egrep "\5 , use echo to output a path, and then egrep find its path base name, and further use Egrep to remove its directory name (note that the directory name, not the directory path);6 , look for all files that do not belong to root, bin, or Hadoop in the/usr directory;# find/usr-not \ (-user root-o-user bin-o-user hadoop \)-ls7 , one day the system was invaded, hackers in your system to leave the Trojan file:

1, the creation of a 10G file system, the type of EXT4, requires the boot can be automatically mounted to a separate data/data directory;(1) Create a new partition[Email protected] wuzhibin]# FDISK/DEV/SDAWarning:dos-compatible mode is deprecated. It ' s strongly recommended toSwitch off the mode (command ' C ') and change display units toSectors (Command ' u ').Command (M for help): N(2) Setting the primary partitionCommand ActionE ExtendedP primary partition (1-4)P(3) Set to 3rd primary partit

';d o echo $RANDOM;d One | Sort-n5. Execute the script/data/get_username.sh at 1:5 A.M. every Tuesday and output the script to the/tmp/get_username.log log file;/usr/bin/mysqldump-uclient-p**************** jzjz >/data/mysqlbak/' Date +%y%m%d '. sqlIf [$?-eq 0];thenecho "Backup OK" >>/tmp/log/mysqlbak.logElseecho "Backup Error" >>/tmp/log/mysqlbak.logFiCortab-e0 2 * * */data/mysqlbak/backup_mysql.sh6. Write a script: If a path does not exist, it is created as a directory, otherwise it is present

replaced by work! Usually this s action can be paired with formal notation!For example 1,20s/old/new/g is! ② Instances[[emailprotected]~]# catsed//edited files 12 34 [[emailprotected]~]# sed ' 3ad ' sed//adds a string after a specified range 12 3 d4 [[emailprotected]~]#sed ' 3d ' sed //Delete a specified range of rows 1 2 4[[email protected]~]#sed ' 2,3cno ' sed//replaces the behavior of the specified range no 1 no4 [[emailprotected]~]#sed ' 3iok ' sed //Insert ok1 before line 3rd 2ok 3 4[ [

Rookie learn shell script, hands practiced hand simple small experiment, use shell script to determine if Nginx is normal operation, if not run the Nginx service start up.First, based on process judgment1, get the nginx process to determine whether the service starts normally.ps-ef | grep nginx | grep-v grep | wc-l outputs the number of process rows and then determines whether the service is not started if it is not a description of 2.grep-v grep is used to rule out the process that you use grep

Explain various raidRAID0:It's usually done with two plates.Write a file on two plates, respectively.This improves read and write speed.But it is not redundant and cannot be recovered by backup after data lossRAID1:It's done with two plates.That's what they call a mirror.Backup for each otherOnce a piece of data is lost, it can be recovered by another pieceRAID5:At least three plates requiredRAID5 is a compromise between RAID0 and RAID1.So it's 10/2=5.20170713l08-00 old boy Linux

. For example, how the system starts, and what is needed to boot it. If you want to test yourself, there is nothing more capable of learning the architecture of the system than making a Linux system of your own. Six, cultivate an open-minded attitude Study stress is calm, you have to remember that people are not omnipotent, everyone has their own lack of place, and people outside, heavens beyond heavens, there is always more than your own good existence, even if you reached the above said al

the structure of the systemUnderstanding the structure of a thing is the best way to learn, is from his structure of a layer of open, and then you will find yourself a lot of places are not understand, and some of the place is wrong, suddenly, suddenly enlightened. For example, how the system starts, and what is needed to boot it. If you want to test yourself, there is nothing more capable of learning the architecture of the system than making a Linux system of your own.Vi. Fostering an open-mi

to be familiar with the command line, Linux is a command line composed of the operating system, his essence on the command line! So you're going to use the command line more and more when you're using more command lines then you're closer to the big God, no matter what level the graphical interface is going to be!Five, familiar with the structure of the systemUnderstanding the structure of a thing is the best way to learn, is from his structure of a layer of open, and then you will find yoursel

BeginRMP-QA |GERP Package Name--------------Find Package----------Gerp, filtering, it seems not so much do not come out.RMP-E Package name-----------------------UninstallInstall the software to mount the CD first, then configure the Yum source, both who can do firstMount-o loop,ro/dev/Disc Path/directory to mountVim/etc/fstab configuration file, auto mount on next bootFormat/dev/cd path Lsource iso9600 ro,loop 0 0Ls/source--------View the contents of the MountVim/etc/yum.reposd/iso.repo-------Co

Introduction: Group of Friends in the interview of a company, the company has a problem: I have two sets of machines, a group of machines address 10.0.1.10 to 10.0.1.30,B Group machine address for 10.0.1.60 to 10.0.1.90A local AAA executable file uploaded to the above server, and the parameter x, Y, z values are 233 executionAAA will automatically generate logs to/tmp/aaa.log, one minute after execution to see if there is an error in the logSecond Interview topic:Nginx output to Slow.log for mor