VICOSYS

Installing and securing Mongo on CentOS 7

September 8th, 2021

vi /etc/security/limits.d/20-nproc.conf

mongod soft nproc 32000

vi /etc/yum.repos.d/mongodb-org.repo

[mongodb-org-5.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/5.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-5.0.asc

yum repolist
yum install mongodb-org
systemctl start mongod

mongosh

db.createUser( { user: "dba", pwd: passwordPrompt(), roles: [ { role: "userAdminAnyDatabase", db: "admin" }, "readWriteAnyDatabase" ] } )

vi /etc/mongod.conf

security:
authorization: enabled

systemctl restart mongod

mongosh
use admin
db.auth(‘dba’,promptPassword())

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VM migration script

April 3rd, 2021

#!/bin/sh

cd /vmfs/volumes/datastore1
scp -r root@192.168.100.27:/vmfs/volumes/datastore1/$1 .
cd $1
vmkfstools -i $1.vmdk -d thin $1-thin.vmdk
rm -f $1.vmdk $1-flat.vmdk
vmkfstools -E $1-thin.vmdk $1.vmdk
vmkfstools -K $1.vmdk
vim-cmd solo/registervm /vmfs/volumes/datastore1/$1/$1.vmx
cd

Posted in VMWare | No Comments »

Adding Timestamp in vmstat / iostat CLI output

June 12th, 2020

vmstat 1 | awk ‘{now=strftime(“%Y-%m-%d %T “); print now $0}’
iostat -x 1 | awk ‘{now=strftime(“%Y-%m-%d %T “); print now $0}’

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Enable Wifi on Setup

April 6th, 2020

Generate Encrypted WIFI Password:

Execute

wpa_passphrase HUAWEI-0969-2.4G 00666507

network={
ssid=”HUAWEI-0969-2.4G”
#psk=”00666507″
psk=fdc5d5d87c4bd4b28e46d0c783cf6cc674549ca43ff242243d33dfe60c8895ec
}

copy the network settings and put it in the file /boot/wpa_supplicant.conf

vi /boot/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=HK

network={
ssid=”HUAWEI-0969-2.4G”
#psk=”00666507″
psk=fdc5d5d87c4bd4b28e46d0c783cf6cc674549ca43ff242243d33dfe60c8895ec
}

Posted in Raspberry Pi | No Comments »