| # Check these threads before proceeding: | |
| # https://github.com/microsoft/WSL/discussions/5857 | |
| # https://github.com/microsoft/WSL/issues/5821 | |
| if (-Not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] 'Administrator')) { | |
| $CmdLine = "-File `"" + $MyInvocation.MyCommand.Path + "`" " + $MyInvocation.UnboundArguments | |
| Start-Process -FilePath PowerShell.exe -Verb Runas -ArgumentList $CmdLine | |
| Exit | |
| } | |
| # Restart the Host Network Service | |
| Restart-Service -Force -Name hns |
| #!/usr/bin/env bash | |
| for tz in Asia/Kolkata US/Eastern Europe/Berlin Asia/Dubai Asia/Singapore Australia/Sydney; do | |
| echo -en "\n$tz " | |
| for i in $(seq -f %02g 0 23); do | |
| echo -n $(TZ=":${tz}" date --date="TZ=\"Asia/Kolkata\" ${i}00" +%H:%M )" " | |
| done | |
| echo "" | |
| done | column -s " " -t 2>/dev/null |
| # Modify this file accordingly for your specific requirement. | |
| # http://www.thegeekstuff.com | |
| # 1. Delete all existing rules | |
| iptables -F | |
| # 2. Set default chain policies | |
| iptables -P INPUT DROP | |
| iptables -P FORWARD DROP | |
| iptables -P OUTPUT DROP |
| #usage awk -F"," -v fm=n -f foldfields.awk <file.csv> | column -t -s"," | |
| #Where n is the fold width | |
| { | |
| maxblk=1; | |
| for (i=1;i<=NF;i++) { | |
| blk=1; | |
| while (length($i)) { | |
| y[i"@"blk]=substr($i,1,fm) ; | |
| blk++; | |
| $i=substr($i,fm-1); |
Configure logstash to read yum.log of 'exampleserver' and notify via Icinga2 if any new packages are installed.
OS: RHEL 7
icinga2 : 2.3.10
Logstash Ver : 2.0
a. vim /etc/icinga2/zones.d/global-templates/templates.conf
template Service "passive-service" {
| #!/bin/bash | |
| #Author:Anon | |
| #Run against all .rrd files inside /usr/local/pnp4nagios/var/perfdata/ | |
| for file in $(find /usr/local/pnp4nagios/var/perfdata/ -name "*.rrd"); do | |
| rrdtool dump "$file" | perl -ne 'BEGIN {$t=`date +%s`; chomp($t);} $a=$_; if ($a =~ /lastupdate.\d+..lastupdate/) { $a =~ s/(lastupdate.)\d+(..lastupdate)/$1$t$2/; } print $a' | rrdtool restore -f - "$file" | |
| done | |
| Today I was just curious which directory holds the deepest file on my Linux PC. | |
| The below command will print the dir with maximum depth. | |
| >find / -type d | awk -F "/" -v slash=0 '{if (NF > slash) { slash=NF; DIR=$0}} END { print DIR":"slash}' | |
| The result I got is 16 as max depth which was a ruby dir. |
| For a linux kernel below 3.2.0-22.25 | |
| yum install kernel-devel automake autoconf gcc glib make ncurses-devel ncurses sysfsutils | |
| yum install rpm-build redhat-rpm-config asciidoc hmaccalc perl-ExtUtils-Embed xmlto | |
| yum install audit-libs-devel binutils-devel elfutils-devel elfutils-libelf-devel | |
| yum install newt-devel python-devel zlib-devel | |
| Download sysfsutils-2.1.0.tar.gz | |
| tar xvf sysfsutils-2.1.0.tar.gz | |
| cd sysfsutils-2.1.0 |
| Requires a linux kernel higher than 3.2.0-22.25 | |
| Server Side: | |
| 1. sudo apt-get install linux-source-3.2.0 | |
| 2. mkdir ~/build | |
| 3. tar xvf /usr/src/linux-source-3.2.0.tar.bz2 -C ~/build | |
| 4. cd ~/build | |
| 5. sudo apt-get install libwrap0-dev gcc libglib2.0-dev libtool automake autoconf pkg-config libsysfs-dev | |
| 6. cd drivers/staging/usbip/userspace/ | |
| 7. ./autogen.sh |
| Install and Configure Cntlm: | |
| 1. Configure EPEL Repo and install cntlm | |
| yum install cntlm | |
| 3. Generate hashes for password-less configuration and add one of the values to /etc/cntlm.conf | |
| cntlm -u <user>@<domain> -H | |
| 3. vi /etc/cntlm.conf | |
| Username <Username> | |
| Domain <Domain> | |
| PassNTLMv2 BCB555F5BA8709B8186C2A813C47A4BD # Only for user '<user>', domain '<domain>' | |
| Proxy <ProxyServer>:<Port> |