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RHEL7: Set up a local
repository for a lab.
Last updated on November 30, 2014 (1,489 views) — No Comments ↓
To be able to quickly deploy new VMs, you need a local repository. Install the Apache package: # yum group install ‐y "Basic Web Server" Create the directories for the CentOS distribution and the updates: # cd /var/www/html # mkdir ‐p conf repo/CentOS/7 # cd repo/CentOS/7 # mkdir ‐p centosplus/x86_64 extras/x86_64 os/x86_64 updates/x86_64
In the software requirements, it was specified to download the DVD version or the Everything version of the CentOS 7 M A R
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6:00 pm View Details vanVugt: Free online class on SELinux issues 6:00 pm View Details vanVugt: Free online class on NFS Kerberos 6:00 pm View Details vanVugt: Free online class on ACLs Home About RHEL6 RHEL7 VCP5DCVdistribution. It is now time to use it. Mount the previously downloaded iso and copy it into the right place: # mount ‐o loop CentOS‐7.0‐1406‐x86_64‐DVD.iso /mnt # cd /mnt # tar cvf ‐ . | (cd /var/www/html/repo/CentOS/7/os/x86_64; tar xvf ‐) # cd /; umount /mnt In order to prepare the centosplus, extras and updates repositories, install the createrepo package: # yum install createrepo Prepare the centosplus, extras and updates repositories: # cd /var/www/html/repo/CentOS/7/centosplus/x86_64; createrepo . # cd ../../extras/x86_64; createrepo . # cd ../../updates/x86_64; createrepo . Go into the directory where the repository configuration is: # cd /etc/yum.repos.d Create the local.repo file and paste the following lines: [os] name=master ‐ Base baseurl=http://192.168.1.5/repo/CentOS/$releasever/os/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm‐gpg/RPM‐GPG‐KEY‐CentOS‐7 [updates] name=master ‐ Updates baseurl=http://192.168.1.5/repo/CentOS/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm‐gpg/RPM‐GPG‐KEY‐CentOS‐7 A P R
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FriRHCSA6:
Task of the
day
Allowed time: 10 minutes. Set up a default configuration HTTP server with SELinux in Enforcing mode and active iptables. 6:00 pm View Details vanVugt: Free online class on Apache 6:00 pm View Details vanVugt: Free online class on troubleshooting 6:00 pm View Details vanVugt: Free online class on iSCSI 6:00 pm View Details vanVugt: Free online class on remote logins[extras] name=master ‐ Extras baseurl=http://192.168.1.5/repo/CentOS/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm‐gpg/RPM‐GPG‐KEY‐CentOS‐7 [centosplus] name=master ‐ CentosPlus baseurl=http://192.168.1.5/repo/CentOS/$releasever/centosplus/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm‐gpg/RPM‐GPG‐KEY‐CentOS‐7 Note: A yum update command will update the system with what the local Apache server’s got. Copy the local.repo file into the /var/www/html/conf directory to make it available to the new VMs: # cp local.repo /var/www/html/conf Assign the SELinux attributes to the files: # restorecon ‐R /var/www/html Activate the Apache server at boot and start it: # systemctl enable httpd && systemctl start httpd Add the Apache service to the firewall configuration: # firewall‐cmd ‐‐permanent ‐‐add‐service=http success Reload the firewall configuration: # firewall‐cmd ‐‐reload
RHCE6: Task
of the day
Allowed time: 15 minutes. Set up a httpd virtual server called "dummy" with DocumentRoot assigned to /opt.How to Configure tigervnc server on Centos 7: How to Configure tigervnc server on Centos 7 bit.ly/1BLEAfI Retweeted by CertDepot Jastis4Ever @Jastis4Ever Expand 6h Tweets Follow Tweet to @CertDepot
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RHEL7 Free available resources RHEL7: Use yum transaction history. RHEL7: Installsuccess Clean up the yum configuration: # yum clean all Check the yum configuration: # yum repolist all Loaded plugins: fastestmirror, langpacks centosplus | 2.9 kB 00:00 extras | 2.9 kB 00:00 os | 3.6 kB 00:00 updates | 2.9 kB 00:00 (1/2): os/7/x86_64/group_gz | 157 kB 00:00 (2/2): os/7/x86_64/primary_db | 4.9 MB 00:00 Loading mirror speeds from cached hostfile repo id repo name status centosplus/7/x86_64 master ‐ CentosPlus enabled: 0 extras/7/x86_64 master ‐ Extras enabled: 0 os/7/x86_64 master ‐ Base enabled: 8,465 updates/7/x86_64 master ‐ Updates enabled: 0 repolist: 8,465 Finally, you need an extra step to regularly update your lab local repository. Create a Bash script called /root/rsync.sh and paste the following lines (where mirror.ovh.net/ftp.centos.org/7/ is the url of a close CentOS repository): #!/bin/bash /usr/bin/rsync ‐av ‐‐delete ‐‐delete‐excluded ‐‐exclude "local" ‐‐exclude "isos" ‐‐exclude "*.iso" ‐‐exclude "xen4" ‐‐exclude "*.i686.*" ‐‐exclude "i386" rsync://mirror.ovh.net/ftp.centos.org/7/ /var/www/html/repo/CentOS/7 Give the execution permissions: # chmod u+x /root/rsync.sh Put this script into the root crontab (# crontab e): Red Hat Enterprise Linux systems as virtual guests. RHEL7 RHCSA Exam objectives RHEL7: Update the kernel package appropriately to ensure a bootable system. RHEL7: Locate, read, and use system documentation including man, info, and files in /usr/share/doc. RHEL7: How to deal with HTTPD SELinux policy. SELINUX: Use boolean settings to modify system SELinux settings. SELINUX: Diagnose and address routine SELinux policy violations. RHEL7: How to install a Nginx & PHP service.
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mfsid on RHEL6 LFCS Exam00 02 * * * /root/rsync.sh Note: The first synchronization will last a while but, after, it will be quick. After synchronization, you will get this kind of result: # yum repolist all Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile repo id repo name status centosplus/7/x86_64 master ‐ CentosPlus enabled: 70 extras/7/x86_64 master ‐ Extras enabled: 44 os/7/x86_64 master ‐ Base enabled: 8,465 updates/7/x86_64 master ‐ Updates enabled: 866 repolist: 9,445
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