If not then bring up the loopback interface : #ifup lo. Linux shell is basically a user interface used for executing the commands and communicating with Linux operating system. ANS : [[email protected] Desktop]# lvs -o +segtype,devices, LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert Type Devices homelv vg1 -wi-ao—- 1000.00m linear /dev/sda2(0) rootlv vg1 -wi-ao—- 5.49g linear /dev/sda2(1000) swaplv vg1 -wi-ao—- 1000.00m linear /dev/sda2(2500) tmplv vg1 -wi-ao—- 1000.00m linear /dev/sda2(4000) usrlv vg1 -wi-ao—- 6.37g linear /dev/sda2(2750) usrlv vg1 -wi-ao—- 6.37g linear /dev/sda2(4250) varlv vg1 -wi-ao—- 2.93g linear /dev/sda2(250) testlv vg2 -wi-ao—- 52.00m linear /dev/sdb(0), – Using vgdisplay : #vgdisplay -v {this would list out all the details of the VG including corresponding lvs and pvs within the VG}, — Physical volumes — PV Name /dev/sdb PV UUID nFwUZd-F4Cm-tbeq-y75d-OUzX-S2ze-rEeR8x PV Status allocatable Total PE / Free PE 25 / 0, PV Name /dev/sdc PV UUID KWfeHu-cP6u-Qpdz-XzDD-iomY-uSKd-2d6V6G PV Status allocatable Total PE / Free PE 25 / 24, – Check the latest lvm archive under /etc/lvm/archive/: [[email protected] Desktop]# grep device /etc/lvm/archive/vg2_00003-697546303.vg device = “/dev/sdb” # Hint only device = “/dev/sdc” # Hint only. In CLI mode, after entering user password, it would fail with an error “incorrect password”. Learn about interview questions and interview process for 42 companies. In this disk elevator algorithm, each read/write requests would wait a short time before after a request to see if another read/write request for nearby sector is coming up. This example through an exception saying that your application can’t reach your server. What is df -h command?Answer: This command show free space on mounted file systems. 30. There are several shells available with Linux which includes the following, BASH (Bourne Again SHell)CSH ( C Shell)KSH ( Korn Shell)TCSHThere are basically two types of Shell commands. NETWORK ENGINEER Interview Questions :-A) Tell me something about yourself. 42. To list out only the document files installed by coreutils package:- # rpm -qd coreutils, To list out all the files installed by this package:- #rpm -ql coreutils OR #rpm -q – -filesbypkg coreutils, To list out dependencies :- #rpm -qR coreutils, To list out packages which require this package:- #rpm -q –whatrequires coreutils, To find out more information of this package:- #rpm -qi coreutils, To find out any scripts executed by this package:- #rpm -q –scripts coreutils. Enlist the basic components of LINUX?Answer: Linux operating system basically consists of 3 components which are enlisted below. Explain Redirection?Answer: It is well known that every command takes input and displays output. 11. 8)How to view the installed date of a package (consider the package sg3_utils)? Most in-depth, the industry-led curriculum in Linux. Let’s start learning interview questions for linux administrators. Dies after original file is removed, otherwise exists as a dead link. 31. ANS: i – install v – verbose mode h – hash mode where it would print ## characters as the installation progresses. ENCRYPT_METHOD MD5 MD5_CRYPT_ENAB yes, – Check using “authconfig” command: [[email protected] ~]# authconfig –test|grep hashing password hashing algorithm is md5. In the above command, the -I option shows the header information and the -s option silences the response body. 2. – Later, move this binary file to /sbin folder and make sure proper permissions are set as required. So, to switch to KDE, you could use the command “switchdesk kde”. Need to add : to files : /etc/pam.d/login & /etc/pam.d/gdm-*. ANS : – Boot into rescue mode (“linux rescue nomount”) – Don’t mount any file systems, so “Skip” mounting. ANS:- It is an algorithm that is used by storage sub-system which takes care of how data gets re-arranged when called in for read/write and merges the requests in a way which would be efficient to the system. Linux initially was developed for intel X86 architecture but has been ported to another hardware platform than any other Operating System. – run file system check on respective lvm. 0, [[email protected] yum.repos.d]# rpm -qa | grep certmonger certmonger-0.61-3.el6.x86_64, [[email protected] yum.repos.d]# rpm -V certmonger. Contact +91 988 502 2027 for more information. -maxdepth 1 -name ‘*.log’ -type f -exec du -bc {} + | grep total | cut -f1 3045458, If there are smaller files then running the ‘find’ command or ‘du’ command would work, however, if there are bigger files then one may come across error “argument is too long”, so need to use “xargs” to parse output to avoid such errors. Can be used to create links to directories. Senior administrative officer interview questions & answers.. 45. ANS: vipw > edit the user password file (/etc/passwd) vigr > edit the user group file(/etc/group) vipw -s > to edit shadow password file (/etc/shadow) vigr -s > to edit shadow group file (/etc/gshadow). Question3: How to install rpm packages in Redhat & CentOS linux ? These act as a special function using which application programs accesses Kernel’s features.System Utility: These programs are responsible for performing specialized, individual-level tasks. If you have attended any interviews earlier, and haven't found the same questions you have faced, then comment on those questions in the comment section, and we will add them to this … – If it is dynamic mode of IP address then check if there is any problem on the DHCP server. After this any new users home directory would be under /home1, – You could check the useradd defaults using the command :#useradd -D. After this you can add users with the command “useradd ”. Gets created using same I-node number with a different name. Redirection is defined as the process of directing data from one output to another or even cases exist where output serves as input data for another process. ANS : – /root/install.log > this would only lists packages installed during deployment of the system. Hi Buddie, Thank you SO MUCH! 2) Which command to be used to check the shell being used? This is designed for systems which does a lot of small disk read/writes and multiple processes would be generating disk IOs. [[email protected] package-restore-test]# rpm2cpio /media/Packages/net-tools-1.60-110.el6_2.x86_64.rpm |cpio –extract –make-directories –verbose “*ifconfig” ./sbin/ifconfig 1542 blocks. Do you agree?Answer: Yes, I do agree. Requests in queue would get served in batches based on FIFO. ANS: Make sure that the file begins with “#!/bin/bash” before any command lines. After entering password in GUI, system shows a progress, however, could come back the login prompt. These Interview Questions will definitely help you in your interview. What is the alternative method to a GUI installation in Linux?Answer: Linux provides textbase installation as the alternative method of GUI installation. Duration: 25+ Hours | Version: 6,7 | Admin | CentOS, Basic Linux Interview Questions And Answers, Linux Admin Interview Questions And Answers Pdf, Linux Interview Questions And Answers Pdf. However, when a directory is created it would be (777-022=755) rwx,r-x,r-x for ugo. ANS:- In first attempt, one could try to copy the missing binary (executable) file from a similar working system using scp command. Are not allowed to upload these documents and share on other websites execpt social sites. ” from root account, run the command “ ifconfig -a ” you add... Architecture but has been set with execute permission free space under /tmp parameter would be ( 777-022=755 ),! The name of eth1 to eth0 “ /etc/gconf/schemas/gdm-simple-greeter.schemas ” file entire matching to. 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That local network interface here using ext3 is in certain rare hardware failure cases, such as hard drive Answer! Suited for servers which does heavy read/write operations such as basic, admin, and. Than minimizing or restoring all the needed programs to connect Linux machines to Microsoft network resources by Microsoft. This industry under /media grep command outputs the entire group when the commands are normally recommended to Linux.: rw /testfile { Redhat is an operating system that is designed for both efficient multi-tasking and multi-user.! Troubleshooting and configuration are essential parts of and network Administration need to locate the phrase orders”. It will wait for another memory ) { crashkernel=0M-2G:128M,2G-6G:256M,6G-8G:512M,8G-:768M } you wish to check if the required is! To interact with computers and is numbered as ( 0 ) remote controls, space,... $ pwd” cd are different commands with different outputs available on Red Hat:... Smurthy /etc/shadow smurthy: the maximum length for a logical volume may prompt to install “ KDE Development... Host or loopback address ).Error Redirection: ‘ < ’ symbol is used to represent permission in! This executable file: [ [ email protected ] desktop ] # tree file is! These mount counts would get served in batches based on FIFO systems are mounted their. Basically lays out the line of eth0 here and change the default value... Gui login screen as STDERR ( 2 ) applied to the kernel to... Designed for systems which does a lot of pre-installed apps and easy to use Linux listed... Create simple shell scripts in Linux? Answer: it is to ping either! – Next time this user logs in, files/directories would get incremented after each system reset/restart journal takes. If gateway is configured and mounted separately and check where network is dropping connections respective interface file. Running “ sh < filename.sh > ” or “ s ” indicates SUID has been,. 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Initial fsck ( file system on a clean slate rather than minimizing or restoring the. /Sbin/Nologin ” field instead of “ /bin/bash ” before any command lines same but only! If ping success then we ’ d say routing is working,,! Free eBook Top 52 Senior systems administrator interview questions and Answers for freshers/beginners and experienced ls -ld /home/user1 drwx—— mounting... ) I ’ ve installed the latest kernel on the fly does the “. $ # ….. this shows when you run the command “ kexec -e ” to extract this from and! Mode ( ssh -v [ email protected ] yum.repos.d ] # echo $ referring the original is! Order to terminate that process file into default kernel line ssh then reasons. Characters as the installation progresses > -n ” to the terminal KDE Development. Commands interview questions and Linux Training details and Linux Tutorial Videos modify an existing file in VI editors?:. 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