WIXLIB

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionOper at e Ru n n in g Syst em sSt ar t , St op, an d Ch eck Net w or k Ser vice St at u sSection 1- Check the status of a service:Basic Red Hat Cer t if iedAdm in ist r at or Sk illss y s t emc t l st at us ser vi ce name. ser vi ce- Start a service:Section 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystems y s t emc t l st ar t s er v i c e name. s er vi c e- Stop a service:s y s t emc t l st at us ser vi ce name. ser vi ce- Gain m ore inform ation:j our nal c t l - x eConfigure Local StorageCreate and Configure FileSystem sView Pr ocesses an d Resou r ce Ut ilizat ionDeploy, Configure, andMaintain system s-Manage Users andGroups-Print a list of active process:ps - efManage Security (Part 1)View real-tim e list of processes and resourceutilization:t opUn der st an d Cor eCom pon en t s of An sible-I n st all an d Con f igu r ean An sible Con t r olNodeSection 4Term inate a running process:k i l l - 15, ki l l - 9, ki l l - lSection 3Copy Files Bet w een Rem ot e Syst em s- Secure Copy:scp f i l e name user name@ser ver : / pat h/ t o/ di r-Secure FTP:sf t p user name@ser verBackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionCon f igu r e Local St or ageList St or age Devices:Section 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssential-dfl sbl kbl ki df di sk - lOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageCreate and Configure FileSystem sDeploy, Configure, andMaintain system sManage Users andGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNodeSection 4Cr eat e a Par t it ion :1. Use f di sk to m anipulate partition table:f di sk / dev/ devi ce name2. Use p to print the partition table and oto create a DOS (MBR) partition table.3. Use n to create a new partition.4. Set it as a prim ary partition using p andaccept the defaults for partition num ber,first sector, and last sector.5. List partition types using l. Change thepartition type to Linux LVM (8e) using t .6. Write the table to disk using w .BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionSection 1Con f igu r e Local St or ageCr eat e an LVM Logical Volu m e:1. Create physical volum e:pvcr eat e / dev/ devi ce nameBasic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageCreate and Configure FileSystem sDeploy, Configure, andMaintain system sManage Users andGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNodeSection 42. List physical volum es:pvs3. Create volum e group:vgcr eat e vol gr oup / dev/ devi ce name4. List volum e groups:vgs5. Create logical volum e:l vcr eat e - L 1G - n new l v vol gr oup6. List logical volum es:l vsDelet e a Logical Volu m e, Volu m e Gr ou p, an dPh ysical Volu m e:1. Delete logical volum e:l vr emove vol gr oup/ new l v2. Delete volum e group:vgr emove vol gr oup3. Delete physical volum e:pvr emove / dev/ devi ce nameBackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionCr eat e an d Con f igu r e File Syst em sCr eat in g an d M ou n t in g File Syst em sSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy, Configure, andMaintain system sManage Users andGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 31. Create a file system on a logical volum e:mkf s. ext 4 / pat h/ t o/ l v2. Mount a file system :mount / pat h/ t o/ l v / pat h/ t o/ di r3. List m ounted file system s: df - h4. Add m ount inform ation to / et c/ f st ab forboot persistence:UUI D UUI D NUMBER / mount / poi ntf s t ype def aul t s 0 0Ext en d Logical Volu m es1. Increase underlying logical volum e:l vext end - L 500M / dev/ vol gr p/ l og vol2. Unm ount filesystem : umount / pat h/ t o/ mount3. Run file system check:e2f sck - f / dev/ vol gr p/ l og vol4. Resize file system :r esi ze2f s / dev/ vol gr p/ l og vol5. List m ounted file system s: df - hI n st all an d Con f igu r ean An sible Con t r olNodeSection 4BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCr eat e an d Con f igu r e File Syst em sM ou n t a Net w or k File Syst em s1. Install required packages:yum i nst al l nf s- ut i l s2. Start required services:syst emct l st ar t r pcbi nd3. Show file system exports on the client:showmount - e SERVER I P4. Mount a network file system : mount - t nf sSERVER I P: / ser ver / di r / cl i ent / di rCon f igu r eLocalLocalSt or ageConfigureStorageCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy, Configure, andMaintain system sManage Users andGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNodeSection 4Cr eat e Collabor at ive Dir ect or ies w it h set -GI D1. Create directory: mkdi r / new/ di r2. Configure set-GID on directory:chmod g s / new/ di r3. Create file in new directory:t ouch / new/ di r / newFi l eWor k in g w it h Vir t u al Dat a Opt im izer (VDO)1. Install required packages: yum install vdo2. Create a vdo volum e: vdo cr eat e- - name vdo vol - - devi ce / dev/ devName- - vdoLogi cal Si ze vol si ze3. View inform ation on vdo volum es:vdost at s - - huBackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionDeploy, Con f igu r e, an d M ain t ain syst em sSt ar t , St op, an d En able Ser vicesSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystem- View yum repositories:l s - a / et c/ yum. r epos. d- Install packages: yum i nst al l packageName- Start a service:syst emct l st ar t name. ser vi ce- Enable a service:syst emct l enabl e name. ser vi ce- Stop a service: syst emct l st op name. ser vi ceCon f igu r eLocalLocalSt or ageConfigureStorageCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy,Configure,Con f igu r e,an dDeploy,andM ain t ainsystemsyst emMaintains sManage Users andGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3Sch edu le Task s Usin g at an d cr on-View the crontab: cat / et c/ cr ont abAdd a task to a user crontab: cr ont ab - eList tasks in a user 's crontab: cr ont ab - lSchedule a task using the at com m and: at t i meList the scheduled jobs: at qDelete a job: at r m j ob numI n st all an d Con f igu r ean An sible Con t r olNodeSection 4BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageDeploy, Con f igu r e, an d M ain t ain syst em sCon f igu r e Syst em s t o Boot in t o Specif ic Tar getAu t om at ically- Check the current configuration:syst emct l get - def aul t- Change the current target:syst emct l i sol at e name. t ar get- Set the default configuration:syst emct l set - def aul t name. t ar get- Change target to rescue m ode:syst emct l r escueCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy,Configure,Con f igu r e,an dDeploy,andM ain t ainsystemsyst emMaintains sManage Users andGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNodeCon f igu r e Tim e Ser vice Clien t1. Install required packages: yum i nst al l chr ony2. Start and enable the chronyd service:syst emct l st ar t chr onyd && syst emct lenabl e chr onyd3. Add the NTP server (server SERVER IP) address to/etc/chrony: vi / et c/ chr ony4. Restart the chronyd service:syst emct l r est ar t chr onydSection 4BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionM an age User s an d Gr ou psCr eat e, Delet e, an d M odif y Local User sSection 1- View user inform ation:Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStoragei d us er namegr oups us er name/ et c / pas s wd/ et c / s hadow/ et c / gr oup- Create a user: user add user name- Modify a user: user mod - d - aG - L - U- Delete a user: user del user nameCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy,Configure,Con f igu r e,an dDeploy,andM ain t ainsystemsyst emMaintains sM an ageUsersUser sandan dManageGr ou psGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNodeCh an ge Passw or ds- Change a password: passwd user name- View password expiry inform ation:chage - l user name- Set password expiration by m ax days:chage - M days user name- Set password expiration by date:chage - E YYYY- MM- DD user nameSection 4BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionM an age User s an d Gr ou psCr eat e, Delet e, an d M odif y Gr ou psSection 1- View group inform ation:i d user namegr oups user name/ et c/ passwd/ et c/ shadow/ et c/ gr oupBasic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy,Configure,Con f igu r e,an dDeploy,andM ain t ainsystemsyst emMaintains sM an ageUsersUser sandan dManageGr ou psGroupsManage Security (Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNode-Create a group: gr oupadd gr oupnameAdd user to a group: user mod - g - aGModify a group: gr oupmod - n - gDelete a group: gr oupdel gr oupnameCon f igu r e Su per u ser Access- View the sudoer s file: vi / et c/ sudoer s- Edit the sudoer s file: vi sudo- Grant a user sudo access by adding the followingline to / et c/ sudoer s :user nameALL ( ALL)ALL- Grant m em bers of a group sudo access by addingthe following line to / et c/ sudoer s :%gr oupnameALL ( ALL)ALLSection 4BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy,Configure,Con f igu r e,an dDeploy,andM ain t ainsystemsyst emMaintains sM an ageUsersUser sandan dManageGr ou psGroupsManageM an ageSecuritySecu r it y(Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3I n st all an d Con f igu r ean An sible Con t r olNodeSection 4M an age Secu r it yCon f igu r e Fir ew all Set t in gs- Install firewalld: yum i nst al l f i r ewal l d- Start and enable firewalld:syst emct l st ar t f i r ewal l d &&syst emct l enabl e f i r ewal l d- View f i r ewal l - cmd options:f i r ewal l - cmd - h man f i r ewal l - cmd- List zones: f i r ewal l - cmd - - get - zones( - - get - def aul t - zone)- List everything added for or enabled in a zone:f i r ewal l - cmd - - l i st - al l - - zone publ i c- Add a service for a zone:f i r ewal l - cmd - - add- ser vi ce ser vi ce( - - per manent )- Add a port for a zone:f i r ewal l - cmd - - add- por t por t / pr ot ocol( - - per manent )- Reload firewall rules: f i r ewal l - cmd - - r el oadCon f igu r e Key Based Au t h en t icat ion f or SSH- Generate public and private key pair: ssh- keygen- Copy a public key to a rem ote server:ssh- copy- i d user name@r emot e host- Default public/private key location:/ home/ user name/ . ssh/BackBack t o M ainNext

Basic Red Hat Certified Adm inistrator SkillsCourse NavigationI n t r odu ct ionM an age Secu r it yWor k in g w it h SELin u xSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an dandan dUseu seUnderstandEssen t ialToolsToolsEssentialOper at eRunningRu n n in gOperateSyst ems sSystemCon f igu r eLocalLocalSt or ageConfigureStorageCr eat eandan dConfigureCon f igu rFilee FileCreateSyst ems sSystemDeploy,Configure,Con f igu r e,an dDeploy,andM ain t ainsystemsyst emMaintains sM an ageUsersUser sandan dManageGr ou psGroupsManageM an ageSecuritySecu r it y(Part 1)Un der st an d Cor eCom pon en t s of An sibleSection 3- View SELinux m odes: get enf or ce- Set m ode to perm issive or enforcing:set enf or ce 0 1- List booleans: get sebool - a- Turn booleans on or off:set sebool bool ean on of f( - P f or per manent )- List SELinux contexts: semanage f cont ext - l- View context on files and process:l s - Z ps - axZ- Change SELinux context:semanage f cont ext - a - t cont ext t ype' / di r ect or y( / . * ) ?'- Restore default contexts:r est or econ - R / di r ect or y- View SELinux policy violations:seal er t - a / var / l og/ audi t / audi t . l ogI n st all an d Con f igu r ean An sible Con t r olNodeSection 4BackBack t o M ainNext

Understand Core Com ponents of AnsibleCourse NavigationI n t r odu ct ionSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an d Cor eCom pon en t s of An sibleSection 3I n ven t or iesInventoriesModulesVariablesFactsPlays and PlaybooksConfiguration FilesI n ven t or iesI n ven t or ies ar e w h at An sible u ses t o locat e an dr u n again st m u lt iple h ost s.- Default location of the hosts file:/ et c/ ansi bl e/ host s- The default location of the hosts file can be set in/ et c/ ansi bl e/ ansi bl e. cf g.- It can be specified using the - i option whenrunning ansi bl e.- The file can contain individual hosts, groups ofhosts, groups of groups, and host and group levelvariables.- It can also Can contain variables that determ inehow you connect to a host.INI-based inventory file:I n st all an d Con f igu r ean An sible Con t r olNodemai l . ex ampl e. c om[ webs er v er s ]web01. ex ampl e. c omweb02. ex ampl e. c omSection 4Con f igu r e An sibleM an aged Nodes[ dbs er v er s ]db[ 01: 04] . ex ampl e. c omSection 5BackBack t o M ainNext

Understand Core Com ponents of AnsibleCourse NavigationI n ven t or iesI n t r odu ct ionSection 1YAML-based inventory file:Basic Red Hat Cer t if iedAdm in ist r at or Sk illsal l :hos t s :mai l . ex ampl e. c omc hi l dr en:webs er v er s :hos t s :web01. ex ampl e. c omweb02. ex ampl e. c omdbs er v er s :hos t s :db[ 01: 04] . ex ampl e. c omSection 2Un der st an d Cor eCom pon en t s of An sibleSection 3I n ven t or iesInventoriesModulesVariablesFactsPlays and PlaybooksConfiguration FilesI n st all an d Con f igu r ean An sible Con t r olNodeSection 4Con f igu r e An sibleM an aged NodesSection 5BackBack t o M ainNext

Understand Core Com ponents of AnsibleCourse NavigationI n t r odu ct ionSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an d Cor eCom pon en t s of An sibleSection 3I n ven t or iesInventoriesModulesM odu lesM odu lesUn der st an din g M odu les- Modules are essentially tools for particular tasks.- Modules can take, and usually do take,param eters.- Modules return JSON.- Run m odules from the com m and line or within aplaybook.- Ansible ships with a significant am ount ofm odules by default.- Custom m odules can be written.VariablesFactsPlays and PlaybooksConfiguration FilesI n st all an d Con f igu r ean An sible Con t r olNodeSection 4Con f igu r e An sibleM an aged NodesSection 5BackBack t o M ainNext

Understand Core Com ponents of AnsibleCourse NavigationI n t r odu ct ionSection 1Basic Red Hat Cer t if iedAdm in ist r at or Sk illsSection 2Un der st an d Cor eCom pon en t s of An sibleVar iablesUn der st an din g Var iables in An sible- Variables nam es should only contain letters,num bers, and underscores.- Variables should always start with a letter.- There are three m ain scopes for variables:GlobalHostPlaySection 3I n ven t or iesInventoriesModulesM odu lesVariablesVar iablesFactsPlays and PlaybooksConfiguration Files- They are typically used for configuration valuesand various param eters.- Variables can store the return value of executedcom m ands.- Variables m ay also be dictionaries.- Ansible provides a num ber of predefined variables.I n st all an d Con f igu r ean An sible Con t r olNodeSection 4Con f igu r e An sibleM an aged NodesSection 5BackBack t o M ainNext

Understand Core Com ponents of AnsibleCourse NavigationVar iablesI n t r odu ct ionSection 1Exam ple of Host Level Variables:Basic Red Hat Cer t if iedAdm in ist r at or Sk illsI NI f or mat :Section 2Un der st an d Cor eCom pon en t s of An sibleSection 3I n ven t or iesInventoriesModulesM odu lesVariablesVar iablesFactsPlays and Playbooks[ webs er v er s ]hos t 1 ht t p por t 80 max Reques t s Per Chi l d 500hos t 2 ht t p por t 305 max Reques t s Per Chi l d 600YAML f or mat :webs er v er s :hos t 1:ht t p por t :max Reques thos t 2:ht t p por t :max Reques t80s Per Chi l d: 500305s Per Chi l d: 600Configuration FilesI n st all an d Con f igu r ean An sible Con t r olNodeSection 4Con f igu r e An sibleM an aged NodesSection 5BackBack t o M ainNext

Understand Core Com ponents of AnsibleCourse NavigationI n t r odu ct ionSection 1

Hat Certified Engineer exam - one for Red Hat Enterprise Linux 7 (EX300) and one for Red Hat Enterprise Linux 8 (EX294). This course was created based on the objectives of the RHEL 8 version of the exam which is EX294. This diagram will be used as a reference point throughout the course and can be used as a