mfernest
commented
7 years ago It looks like you're using Issues to submit your lab work. They're only intended to log your progress.
You should have one Issue called "Installation Lab" that logs the progress of all the exercises, not one Issue for each exercise.
barlearn
Swappiness file located in /proc/sys/vm and is named “swappiness”. Temporary change lost on reboot sudo sysctl vm.swappiness=1
permanent change by navigating to /etc/sysctl.conf
add the below line
vm.swappiness=”1”
Mount attributes of all volumes Fdisk - l Sfdisk –l -uM Cfdisk /dev/xvde df -h lsblk blkid
Reserve space of any non-root, ext-based volumes tune2fs -l /dev/xvde root@\Barlearn1$ tune2fs -l /dev/xvde tune2fs 1.41.12 (17-May-2010) Filesystem volume name:
Last mounted on: /
Filesystem UUID: 6a49d30a-8aa0-4380-96d3-eb7b2dc33e59
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
df -hT
root@\Barlearn1$ df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/xvde ext4 7.8G 1.5G 6.0G 20% / tmpfs tmpfs 7.3G 0 7.3G 0% /dev/shm
Show that transparent hugepages is disabled Sysctl -a | grep hugepages vm.nr_hugepages = 0 vm.nr_hugepages_mempolicy = 0 vm.hugepages_treat_as_movable = 0 vm.nr_overcommit_hugepages = 0
root@\Barlearn1$ pwd /sys/kernel/mm root@\Barlearn1$ ls -ltr total 0 drwxr-xr-x 2 root root 0 Dec 6 02:40 ksm drwxr-xr-x 3 root root 0 Dec 6 02:40 hugepages
root@\Barlearn1$ cat grub.conf default=0 timeout=1
title CentOS (2.6.32-642.11.1.el6.x86_64) root (hd0) kernel /boot/vmlinuz-2.6.32-642.11.1.el6.x86_64 root=/dev/xvde ro crashkernel=auto LANG=en_US.UTF-8 KEYTABLE=us initrd /boot/initramfs-2.6.32-642.11.1.el6.x86_64.img title CentOS-6.3-x86_64-GA-03 2.6.32-279.el6.x86_64 root (hd0) kernel /boot/vmlinuz-2.6.32-279.el6.x86_64 root=/dev/xvde ro initrd /boot/initramfs-2.6.32-279.el6.x86_64.img
Report the network interface attributes cat resolv.conf cat fstab
Show forward and reverse host lookups using getent and nslookup
getent hosts ip-172-31-10-176 | awk '{print $1}' 172.31.10.176
Nslookup was unavailable
Yum install bind-utils
root@\Barlearn1$ nslookup cloudera.com Server: 172.31.0.2 Address: 172.31.0.2#53
Non-authoritative answer: Name: cloudera.com Address: 74.217.76.7
Verify the nscd service is running By default the service was missing and I installed using Yum install nscd root@\Barlearn1$ service nscd status nscd (pid 2469) is running... Verify the ntpd service is running? Yum install ntp root@\Barlearn1$ service ntpd status ntpd (pid 2532) is running...
Completed !