tripwire ops

}##############################################################A= $spaceline 1b= $spaceline 2echo "The Space_line:"CompareEchoA= $line 1b= $line 2echo "The line:"CompareTest results:[Email protected] ~]# bash test6.shPlease enter the file path:/root/aa/root/bbThe Space_line:Max/root/aa/root/aa:2The line:Max/root/bb/root/bb:11[[email protected] ~]# cat AAAaaaaaaaaaaaaaaaaaAaaaaaaaaaaaaaAaaaaaaaaaaaaaaaaaa[email protected] ~]# cat BBbbbbbbbbbbbbbbbbbbbbbABCCccCcccDDC8. Write a script(1) Prompt the

technologies in Apache and Nginx, such as system tuning and service optimization, and program optimization, which is difficult to learn before working in contact with the work, so let's take this 10 to learn. It's hard to know that you have to learn to do it for at least 3 months, and that part of the script is exhausting. I suggest that it would be better to learn the shell first, and then learn another scripting language after work.The above is to step into the Linux operations engineers need

number of files in two files and their total number of rows;8. 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;9, write a script, print 2^n table; n equals the value entered by a user; (Sorry, I'm naughty)10, write a script, write a few functions: function 1, to achieve the sum of two numeric values, function 2, take a given two numeric value of greatest common divisor, function 3, ta

currently online. (Chronograph 1 minutes)15. Please describe the role and grammar of the crontab, as well as the key points to note when writing a timed task. (3 minutes)16. How do I set timed tasks for time synchronization? (Chronograph 2 minutes)17. Give the correct command to shut down and restart the server. (Chronograph 2 minutes)18. Please briefly describe the considerations for modifying the/etc/sudoers configuration file (2 minutes)19. Please describe how to achieve the centralized mana

The purpose of the experiment is to bind the two NICs, and solve the load balancing and automatic switching. Linux operating system 6.5,bond0,eth1,eth2. Bond0 10.10.9.126 eth1 no eth2. The configuration is as follows: cd/etc/sysconfig/network-scripts//Enter the network configuration file CP ifcfg-eth0 ifcfg-bond0/Copy ifcfg-eth0 renamed to ifcfg-bond0 the original Ifcfg-eth0 continues to exist Configure IFCFG-BOND0Device=bond0Bootproto=noneOnboot=yesipaddr=10.10.9.126dns=202.106.196.

;[[email protected] hi]# find/etc-mtime-7[[email protected] ~]$ find/etc-size 20k-type F8, create the directory/test/data, let a group of ordinary users have write permissions to it, and all the files created by the group is the directory belongs to the group; In addition, each user can only delete their own files.[Email protected] hi]# mkdir-p/test/data [[email protected] hi]# chown root.tomcat/test/data[[email protected] hi]# US Ermod-g Tomcat Nginx[[email protected] hi]# usermod-g tomcat hado

Learn from the old boy Linux operation and maintenance of a book will be published, to seek the advice and choice of everyone!The students of the publishing house are very hard, and now the publishing house has designed us with the old boy to learn the cover of Linux operation and Maintenance bookTwo cover, everyone think which good on the review, must be two choose one ah!Choose which, say the reason of choice, thank you all! add the two QQ Exchange Group 226199808 and 339128815

out the statements in the Crontab24, use a command to see the current system has started the service listening to the port25. Use the Linux system command to count the number of connections to the establish state26, a ext3 file partition, when using touch new file times wrong, the error message is that the disk is full, but use df-h to view the partition information only used 50%, please analyze the specific reason27. List common packaging tools and write the corresponding decompression paramet

dns222.lxcdn.net.dns222 in A 172.16.0.222www in A 172.16.0.100: WqVim/var/named/tarena.com.lxcdn.net.gzzone$TTL 3600@ in SOA @ root (201512060028800144001720086400)@ in NS dns222.lxcdn.net.dns222 in A 172.16.0.222www in A 172.16.0.200: WqVim/var/named/lxcdn.net.zone$TTL 3600@ in SOA @ root (201512060028800144001720086400)@ in NS dns222.lxcdn.net.In A 172.16.0.222dns222 in A 172.16.0.222squid100in A 172.16.0.100squid200in A 172.16.0.200: WqService named Start;chkconfig named on------------------

/wKioL1byQ0XDHljPAAAw6y8XYJM126.jpg "alt=" Wkiol1byq0xdhljpaaaw6y8xyjm126.jpg "/>2, based on the environment in the 1 topic, re-establish a similar environment, requirements:A) automate synchronization of Web service file updates to another machineb) database for master-slave replicationc) Web site source code backup and MySQL backup via shell script, backup strategy including full-volume, incremental, differential backup3, the use of pressure measurement tools (ab/webbench, etc.) to achieve the

Hello everyone!My name is Shanping, from Anhui Wuhu, now in Shanghai, a company to work, work, through the previous colleagues introduced so determined to learn liunx operation, and thus change their lives.Through this old boy it education online 3 period of study, I want to reach million yuan monthly salary.In order to achieve this goal, I will take the 10 major actions:1. Take at least 3-4 hours a day to learn, watch videos, practise.2. Try to listen to the teacher in class, take notes and do

My name is Wang Yongxieng, after 5 months in the old boys education Linux operations class, I must achieve the salary target is 10k, in order to achieve the goal I will take the following major action plan:1, actively listen in class, actively answer questions,2, study time must reach more than 12 hours per day3 to do pre-class preview, after-class summary review,4, every day in strict accordance with the requirements of the teacher must do5, no matter what, can not be late to leave early or abs

My name is Wang Yongxieng, after 5 months in the old boys education Linux operations class, I must achieve the salary target is 10k, in order to achieve the goal I will take the following major action plan:1, actively listen in class, actively answer questions,2, study time must reach more than 12 hours per day3 to do pre-class preview, after-class summary review,4, every day in strict accordance with the requirements of the teacher must do5, no matter what, can not be late to leave early or abs

directory is/users/magedu, and then su switch to this user, copy multiple files to the home directory;# useradd-d/users/magedu magedu# su magedu# cp-r/tmp//users/magedu15, expand MYLV1 to 9G, ensure that the original data is fully available after the expansion;#lvexpand-L 9G/DEV/MYVG/MYLV116, reduce MYLV1 to 7G, to ensure that the original data is fully available after the completion of the reduction;# UMOUNT/DEV/VGTEST/MYLV1# e2fsck-f/DEV/MYVG/MYLV1# RESIZE2FS/DEV/MYVG/MYLV1 7G# lvreduce-l 7G/

not stop Ah, TMD notice, don't sb), stop Slave, and then change master_to to synchronize, and finally start slave, if the error, the executionThe command set global sql_slave_skip_counter=1 is used to skip errors for synchronization.Reference Document: http://storysky.blog.51cto.com/628458/259280/30, production scenarios, a master from the environment, a certain from the library down, and now repaired, how can you restore Master-slave synchronization? If the main library is down and repaired, h

:55px; "alt=" Wkiom1xunvpguzvxaack9pextja996.jpg "src=" Http://s3.51cto.com/wyfs02/M02/72/D3/wKiom1XuNVPguZVxAACK9pExTjA996.jpg "/>650) this.width=650; "title=" 2.png "alt=" wkiol1xun2tcw4k_aatg5jpjpso999.jpg "src=" http://s3.51cto.com/wyfs02/M02/ 72/d0/wkiol1xun2tcw4k_aatg5jpjpso999.jpg "/>3, every Sunday 2:30 A.M., run the CP command to backup the/etc/fstab file, the storage location is/BACKUP/FSTAB-YYYY-MM-DD-HH-MM-SS;2 * * 7/bin/mkdir-p/backup/"fstab-" '/bin/date +\%y-\%m-\%d\-%h-\%m-\%s ' /

to manage other users ' cron tasks, by default managing their own- L List , List Tasks- R Remove , remove All Tasks (note: Deleting a task should delete the row implementation via the edit interface)- e Edit , open the Edit Interface Definition Corn TaskCRONTAB-E-U USERNAMETopic:1, every Monday to Saturday 3:20 A.M., run the tar command to save the/etc/directory for archiving, storage location is/BACKUPS/ETC-YYYY-MM-DD.TAR.XZ[[Email protected] ~] #mkdir/backups/[[email protected] ~] #contab-E30

First, homework (exercise) content:1. Summarize the detailed usage method of the task plan (at, crontab) on Linux system;2, every Monday to Saturday 3:20 A.M., run the CP command to archive the/etc/directory, storage location is/BACKUPS/ETC-YYYY-MM-DD;3, every Sunday 2:30 A.M., run the CP command to backup the/etc/fstab file, the storage location is/BACKUP/FSTAB-YYYY-MM-DD-HH-MM-SS;4, every night 12 o'clock, get all the lines in the/proc/meminfo file starting with S or M, appended to the/statist

4th column represents the month 1~125th Column Identification Number Week 0~6 (0 = Sunday)6th List of commands to run 2, every Monday to Saturday 3:20 A.M., run the CP command to archive the/etc/directory, storage location is/BACKUPS/ETC-YYYY-MM-DD;[[email protected] ~]# CRONTAB-E20 3 * * 1-6/bin/cp-r/etc/backups/etc-$ (date ' +%f ') 3 * * 1-6/bin/tar-czvf/back ups/etc-$ (date ' +%f '). tar.gz3, every Sunday 2:30 A.M., run the CP command to backup the/etc/fstab file, the storage loca

files;11. Find all files that are not root, bin or hadoop under the/usr directory;12. Find all files whose contents have been modified and are not root or Hadoop for the last week in/etc directory;13. Find all files on the current system that are not owned by the master or group, and have been visited in the last week;14. Find all files of more than 20k and type of ordinary person in/etc directory;15, look for all the users in/etc directory do not have permission to write files;16. Find at leas