Linux Disk Management – Multipath Management

Contents 1 Cofiguring Multipathing 1.1 Install Multipath Package. 1.2 Enable The Multipathing Service. 1.3 List Multipath Disks 2 Zoning FC On Linux 2.1 Find the WWN for the Ports 2.2 Issuing a LIP on the HBA 2.3 Fibre Channel Commands 3 Disk Configuration. 3.1 About Device Names And Paths In A Multipath Configuration 3.1.1 Physical …

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Linux RAID & LVM

LVM stuff pvdisplay vgdisplay lvdisplay Check status cat /proc/mdstat cat /etc/mdadm.conf Make Raid 10 mdadm –create /dev/md30 –run –level=10 –chunk=4 –raid-devices=4 /dev/sda /dev/sdb /dev/sdd /dev/sdf mdadm –examine /dev/md30 mdadm –detail /dev/md30 Make file system mkfs.ext4 -O extent -b 4096 -E stride=128,stripe-width=128 -O ^has_journal /dev/md30 tune2fs -o journal_data_writeback /dev/md30 # append output to /etc/mdadm.conf mdadm –detail …

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Configuring Linux LDAP & SSSD

Follow the process below to get ldap working on Linux First, Disable the firewall (or configure to allow LDAP traffic). systemctl disable firewalld systemctl stop firewalld /etc/selinux/config SELINUX=disabled LDAP configuration # DC1 echo -n | openssl s_client -connect | sed -ne ‘/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p’ > /etc/openldap/cacerts/ldap1.pem echo -n | openssl s_client -connect | …

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Creating a Linux Bond With vLan Tags

How to create a vlan interface and start at boot time. First check if the bounding module is loaded. lsmod | grep 8021q /etc/sysconfig/network-scripts/ifcfg-solr DEVICE=solr TYPE=Ethernet BOOTPROTO=none ONBOOT=yes /etc/sysconfig/network-scripts/ifcfg-solr.2018 DEVICE=solr.2018 IPADDR= NETWORK= NETMASK= GATEWAY= ONBOOT=yes BOOTPROTO=none USERCTL=no VLAN=yes To test just issue /etc/init.d/network restart or ifup [if_name] To remove the new vlan How to remove …

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OpenStack – Linux workprogress

Openstack docs How to Install Your Own Cloud Platform with OpenStack in RHEL/CentOS 7 Openstack video

How to install Linux (OEL) on SPARC

How to configure OVM for SPARC(LDOMS) for (OEL) Below is a OVM for SPARC(LDOMS) configuration to run Linux (OEL) on a SPARC server (T5/T7). Note: The T5-x or T7-x might require the latest firmware for this to work. ldm add-vcc port-range=5000-5100 primary-vcc0 primary svcadm enable svc:/ldoms/vntsd:default ldm set-core 28 primary ldm set-memory 256g primary ldm …

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How to measure network Bandwidth in Linux

Usage as below from same folder: To check packer per interface: ./ eth0 To check speed per interface: ./ eth0 Measure Packets per Second on an Interface as file name #!/bin/bash INTERVAL="1" # update interval in seconds if [ -z "$1" ]; then echo echo usage: $0 [network-interface] echo echo e.g. $0 eth0 echo …

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