comptia linux practice test

disks. It divides all the hard drives into two groups, becoming the lowest combination of RAID 1, while the two groups of hard disksEach is considered RAID 0 operation when RAID 10 has one hard drive damaged, the remaining drives will continue to operate. Raid 01 Only one hard drive is damaged, and all hard drives in the same group of RAID 0 will stop functioning.Only other groups of hard drives are operating with less reliability. If you build raid 01 with six hard disks, and then use three RA

, [], [[]], (()):650) this.width=650; "Width=" "height=" 98 "title=" 2.png "style=" width:600px;height:98px;float:left; "alt=" Wkiom1kama_rp_flaabakvhuvvm588.png "src=" Https://s4.51cto.com/wyfs02/M02/92/80/wKiom1kAMA_Rp_ Flaabakvhuvvm588.png "border=" 0 "vspace=" 0 "hspace=" 0 "/> Above for I read "with the old boy learn Linux Yun Koriyuki Shell programming Combat" This book when the note, if there are any copyright issues, please contact the m

remote Linux servers? Upload files and download files via what?A.ssh XsheelB.SCP some software can upload downloaded files, no use.9.What is the main use of the/mnt directory? What does the/root directory have to do with the root user? /What is the connection between the root directory and the/boot directory? A./MNT mount directory for external devicesB./root is the root user directoryC./boot10. What happens when the RM-RF * is executed on one day? P

Requirements: On-line system performance optimization, locating servers and online system bottlenecks Based on on-line experience data and expectation quantification Data Up Down On-line data 50 500 Test data 100 500~2000+ Test data 200

Learn more about the character test of Linux and the practice of bash scriptingOne, character test options= =: Tests whether two strings are equal, equals true, and not equal to false.！ =: Tests whether two strings are unequal, unequal to true, and equal to false.-N String: Tests whether the specified string is empty,

Linux Message Queue practice (2) and linux Message Queue practiceMessage Queue Functions #include Msgctl Function Function: gets/sets Message Queue information. Prototype: int msgctl(int msqid, int cmd, struct msqid_ds *buf); Parameters: Msqid: ID of the Message Queue returned by the msgget Function Cmd: the action to be taken (see below) Return Value:

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result. second, mastering the Disassembly and hex programmer Instruction "Objdump-d Login" To view the disassembly code Change 750e to 7500Note: In order to skip the password check, that is, regardless of the results of the comparison, the normal landing.Jne is the conditional jump, if the condition satisfies, then jumps;Jne the next two lines is the output content;JMP is a jump statement (no conditions, then jump directly)The next two lines of JMP are also output.Jne that jum

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

module, thus saving the test time. I think this is within the scope of the development Department of the Test, and the QA/QC department has no big relationship, in fact, the use cases at this level is not QC can do and understand. White Box testing: Design test instances for logical processes in the context of understanding internal processes, with the aim of i

service:Sudo/etc/init.d/ssh restart(4) Run Puttygen.exe Select Generate key pair (private key exists on this machine, copy public key)(5) Copy the public key contents, write to the remote host, use the command vim ~/.ssh/authorized_keys(6) Modify the configuration file by command Vim/etc/ssh/sshd_config and add two lines at the bottom:Pubkeyauthentication YesAuthorizedkeysfile. Ssh/authorized_keysAfter you save and exit, disconnect.(7) Once again using putty to connect, in the Connection->data

V directly after-su NMAP-SUV 192.168.0.1 XMAS scan: for operating systems running unxi and Linux. NMAP-SX-p-PN 192.168.0.1 Using-SV, you can analyze the banner information to determine the port situation when the other party uses this port. -O parameters provide information about the operating system. -The t parameter changes the scanning speed. The parameter range is: 0 ~ 5. Reduce the speed to avoid being detected. Too fast will

Linux and Security--linux Basic practice one, practice one: Master the maintenance method of the software source, configure the system to use the software source image in the education network. Master the method of finding, installing, uninstalling and updating software through the software source. 1. How to maintain t

whether a specified software is installed. findShould be the strongest of these commands.3. Digital Rain 4. Job 5. Challenge One Sixth section file packaging and decompression Learned the use of the common compression/decompression tools on Linux- Zip,rar,tar . 1.zip/tar common commands zip Package: Zip something.zip Something (directory please add-r parameter) Unpack: unzip something. Zip S

, Redis-server redis.conf.The service has started and we should start the client next.3.9. Now look at the datas and logs directories below, there will be corresponding files, also indicates the server-side success of starting Redis. 3.10, start the Redis client, under the root directory, execute the following command:./application/program/redis-tool/redis-cli-h 192.168.127.128-p 6379, the interface is as follows. The current directory is located in a different location, the command will be diff

stylish, easy to test, moderate cost!As the most influential global leader in the global ICT sector, CompTIA is professional, fair and impartial in the field of information security talent certification. Security+ certification is highly operational and closely related to the daily work of frontline engineers. Suitable for banks, securities, insurance, internet companies and other IT-related personnel lear

depth option to enable the Find command to do so. One reason for this is that when you use the Find command to back up the file system to tape, you want to back up all the files first, and then back up the files in the subdirectories.The instance 1:find command starts at the root of the file system and looks for a file named Con.file.Command:Find/-name "CON. FILE "-depth-printDescriptionIt will first match all the files and then go to the subdirectory to find12. Using the Mount option:You can u

first 3 characters per lineThe sed '/east/,/west/s/north/south/' Filex replaces the north of all rows from east to west with SouthSed-n '/time off/w timefile ' Filex writes all rows containing time off to the Timefile fileSed ' s/\ ([oo]ccur\) ence/\1rence/' file replaces all occurence with occurence,occurenceSed-n ' | ' Filex print all \nn display nonprinting characters, TAB key (tab) is displayed as a > line [Root@linux ~]# sed [-NEFR] [action]

First, the Linux basic Practice 1.11. Master The maintenance method of the software source, configure the system to use the software source image. Master the method of finding, installing, uninstalling and updating software through the software source. This part of the content in many seniors study Sister's report has a very detailed explanation, I do not repeat here.1.21. Master the concept of

Linux C programming practice (2 )?? File System Programming 1. Linux file system Linux supports multiple file systems, such as ext, ext2, minix, iso9660, msdos, fat, vfat, and nfs. At the upper layer of these specific file systems, Linux provides a virtual file system (VFS)