Fedora 20 : install Go 1.2 lang

Reference

http://golang.org/

# cat /etc/fedora-release ;uname -ri Fedora release 20 (Heisenbug) 3.13.0-1.vanilla.mainline.knurd.1.fc20.x86_64 x86_64

download go lang from https://code.google.com/p/go/downloads/list

untar file and store these file under /usr/local/go directory

# tar -C /usr/local -xzf go1.2.linux-amd64.tar.gz

# ls /usr/local/go AUTHORS       LICENSE  README   api  blog  favicon.ico  lib   pkg         src CONTRIBUTORS  PATENTS  VERSION  bin  doc   include      misc  robots.txt  test

# export PATH=$PATH:/usr/local/go/bin

# which go /usr/local/go/bin/go # go version go version go1.2 linux/amd64

make a go file

# cat hello.go package main import "fmt" func main() {    fmt.Print("hello\n") }

run

# go run hello.go hello

Fedora 20: build a VM with virt-builder

Here are trial and error logs when building VMs for KVM by using virt-builder

reference

http://libguestfs.org/virt-builder.1.html

[root@f20 ~]# cat /etc/fedora-release Fedora release 20 (Heisenbug) [root@f20 ~]# uname -ri 3.13.0-0.rc8.git2.1.vanilla.mainline.knurd.1.fc20.x86_64 x86_64 [root@f20 ~]# qemu-system-x86_64 --version QEMU emulator version 1.7.0, Copyright (c) 2003-2008 Fabrice Bellard

virt-builder includes libguest-tools.

# yum install libguestfs-tools # libguestfs-test-tool --version libguestfs-test-tool 1.24.4fedora=20,release=1.fc20,libvirt

list OSes you can build

# virt-builder --list virt-builder: warning: cache /root/.cache/virt-builder: Unix.Unix_error(20, "mkdir", "/root/.cache/virt-builder") virt-builder: disabling the cache centos-6                 CentOS 6.5 cirros-0.3.1             CirrOS 0.3.1 debian-6                 Debian 6 (Squeeze) debian-7                 Debian 7 (Wheezy) fedora-18                Fedora® 18 fedora-19                Fedora® 19 fedora-20                Fedora® 20 scientificlinux-6        Scientific Linux 6.4 ubuntu-10.04             Ubuntu 10.04 (Lucid) ubuntu-12.04             Ubuntu 12.04 (Precise) ubuntu-13.10             Ubuntu 13.10 (Saucy)

build a Fedora20 VM

error.

# virt-builder fedora-20 --root-password file:./rootpw.txt -o f20-vm.qcow2 --format qcow2 --size 20G --hostname f20-vm.example.com --install "@core" --firstboot-command 'yum update -y' --firstboot-command 'localectl set-locale LANG=ja_JP.utf8' --firstboot-command 'set-keymap jp' virt-builder: warning: cache /root/.cache/virt-builder: Unix.Unix_error(20, "mkdir", "/root/.cache/virt-builder") virt-builder: disabling the cache [   1.0] Downloading: http://libguestfs.org/download/builder/fedora-20.xz #######################################################################  100.0% [ 510.0] Planning how to build this image [ 510.0] Uncompressing [ 521.0] Resizing (using virt-resize) to expand the disk to 20.0G Fatal error: exception Guestfs.Error("could not create appliance through libvirt. Try running qemu directly without libvirt using this environment variable: export LIBGUESTFS_BACKEND=direct Original error from libvirt: 内部エラー: モニターに接続中にプロセス

Configure LIBGUESTFS_BACKEND environment.

# export LIBGUESTFS_BACKEND=direct # echo $LIBGUESTFS_BACKEND direct

okay.

# virt-builder fedora-20 --root-password file:./rootpw.txt -o f20-vm.qcow2 --format qcow2 --size 20G --hostname f20-vm.example.com --install "@core" --firstboot-command 'yum update -y' --firstboot-command 'localectl set-locale LANG=ja_JP.utf8' --firstboot-command 'set-keymap jp' virt-builder: warning: cache /root/.cache/virt-builder: Unix.Unix_error(20, "mkdir", "/root/.cache/virt-builder") virt-builder: disabling the cache [   1.0] Downloading: http://libguestfs.org/download/builder/fedora-20.xz #######################################################################  100.0% [ 518.0] Planning how to build this image [ 518.0] Uncompressing [ 529.0] Resizing (using virt-resize) to expand the disk to 20.0G [ 561.0] Opening the new disk [ 565.0] Setting a random seed [ 565.0] Setting the hostname: f20-vm.example.com [ 565.0] Setting root password [ 565.0] Installing packages: @core [ 624.0] Installing firstboot command: [1] yum update -y [ 624.0] Installing firstboot command: [2] localectl set-locale LANG=ja_JP.utf8 [ 624.0] Installing firstboot command: [3] set-keymap jp [ 624.0] Finishing off Output: f20-vm.qcow2 Output size: 20.0G Output format: qcow2 Total usable space: 19.0G Free space: 18.1G (95%)

the VM image has been created under the directory where you issued virt-builder command.

# file f20-vm.qcow2 f20-vm.qcow2: QEMU QCOW Image (unknown version)

copy the original VM image to KVM pool ( in my case, /var/lib/libvit/images/disk1 )

# cp f20-vm.qcow2 /var/lib/libvirt/images/disk1/f20.qcow2

deploy the VM.

# yum install virt-install # virt-install --import --name f20-vm1 --ram 512 --disk path=/var/lib/libvirt/images/disk1/f20-vm1.qcow2,format=qcow2,device=disk,bus=virtio,20G ERROR    Error with storage parameters: Size must be specified for non existent volume path '/var/lib/libvirt/images/disk1/f20-vm1.qcow2' [root@f20 Virtbuilder_works]# virt-install ERROR     [    0.000000] Initializing cgroup subsys cpuset [    0.000000] Initializing cgroup subsys cpu [    0.000000] Initializing cgroup subsys cpuacct [    0.000000] Linux version 3.11.10-301.fc20.x86_64 (mockbuild@bkernel01.phx2.fedoraproject.org) (gcc version 4.8.2 20131017 (Red Hat 4.8.2-1) (GCC) ) #1 SMP Thu Dec 5 14:01:17 UTC 2013 [    0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.11.10-301.fc2

when booting the VM for the  first time, execute “yum update” automatically.

[  112.857596] firstboot.sh[408]: Transaction test succeeded [  112.859440] firstboot.sh[408]: Running transaction [  114.431092] firstboot.sh[408]: Updating   : libselinux-2.2.1-6.fc20.x86_64                             1/129 [  115.127248] firstboot.sh[408]: Updating   : nspr-4.10.2-1.fc20.x86_64                                  2/129 [  115.797586] firstboot.sh[408]: Updating   : nss-util-3.15.3-1.fc20.x86_64                              3/129 [  116.429433] firstboot.sh[408]: Updating   : audit-libs-2.3.3-1.fc20.x86_64                             4/129

Fedora 20: gather information about a domain with dnsenum

http://code.google.com/p/dnsenum/

dnsenum is a tool to collect DNS information, such as, A, NS, whois etc

In case of Fedora20, you can install dnsenum via yum.

# cat /etc/fedora-release ;uname -ri Fedora release 20 (Heisenbug) 3.12.7-300.fc20.x86_64 x86_64

install

# yum install -y dnsenum.noarch

To check the usage, please type “dnsenum –help”

# dnsenum --help dnsenum.pl VERSION:1.2 Usage: dnsenum.pl [Options] <domain> [Options]: Note: the brute force -f switch must be specified to be able to continue the process execution. GENERAL OPTIONS:  --dnsserver   <server>                        Use this DNS server for A, NS and MX queries.  --enum                Shortcut option equivalent to --threads 5 -s 20 -w.  -h, --help            Print this help message.  --noreverse           Skip the reverse lookup operations.

Here are sample usages.

needs Net::WhoisIP module to get whois information.

# dnsenum -r -d 3 -w -r --dnsserver 192.168.0.100 isc.org dnsenum.pl VERSION:1.2 Warning: can't load Net::Whois::IP module, whois queries desabled. -----   isc.org   ----- ----------------- Host's addresses: ----------------- isc.org.       49      IN      A       149.20.64.69 ------------- Name servers: -------------  ns.isc.afilias-nst.info.      86151   IN      A       199.254.63.254  sfba.sns-pb.isc.org.  6951    IN      A       149.20.64.3  ord.sns-pb.isc.org.   6951    IN      A       199.6.0.30  ams.sns-pb.isc.org.   6951    IN      A       199.6.1.30 ----------- MX record: -----------  mx.pao1.isc.org.      3352    IN      A       149.20.64.53  mx.ams1.isc.org.      3352    IN      A       199.6.1.65 --------------------- Trying Zonetransfers: --------------------- trying zonetransfer for isc.org on ns.isc.afilias-nst.info ... trying zonetransfer for isc.org on sfba.sns-pb.isc.org ... trying zonetransfer for isc.org on ord.sns-pb.isc.org ... trying zonetransfer for isc.org on ams.sns-pb.isc.org ... brute force file not specified, bay.

install Net::WhoisIP via yum

# yum install -y perl-Net-Whois-IP

try again.

# dnsenum -r -d 3 -w -r --dnsserver 192.168.0.100 isc.org -v dnsenum.pl VERSION:1.2 -----   isc.org   ----- ----------------- Host's addresses: ----------------- isc.org.       21      IN      A       149.20.64.69 ------------- Name servers: -------------  sfba.sns-pb.isc.org.  6770    IN      A       149.20.64.3  ams.sns-pb.isc.org.   6770    IN      A       199.6.1.30  ns.isc.afilias-nst.info.      85970   IN      A       199.254.63.254  ord.sns-pb.isc.org.   6770    IN      A       199.6.0.30 ----------- MX record: -----------  mx.pao1.isc.org.      3171    IN      A       149.20.64.53  mx.ams1.isc.org.      3171    IN      A       199.6.1.65 --------------------- Trying Zonetransfers: --------------------- trying zonetransfer for isc.org on sfba.sns-pb.isc.org ...  AXFR record query failed: Response code from server: REFUSED trying zonetransfer for isc.org on ams.sns-pb.isc.org ...  AXFR record query failed: Response code from server: REFUSED trying zonetransfer for isc.org on ns.isc.afilias-nst.info ...  AXFR record query failed: Response code from server: REFUSED trying zonetransfer for isc.org on ord.sns-pb.isc.org ...  AXFR record query failed: Response code from server: REFUSED ---------------- Wildcards test: ---------------- good brute force file not specified, bay.