pbkwee

# As an alternative to the remembering the following syntax:
# true | true | true; echo ${PIPESTATUS[${#PIPESTATUS[@]}-1]} => 0
# true | true | false; echo ${PIPESTATUS[${#PIPESTATUS[@]}-1]} => 1
#
# from bash 4.2 you can also do (more simply):
# true | true | false; echo ${PIPESTATUS[-1]} => 1 (and also: -bash: PIPESTATUS: bad array subscript)
#
# e.g. true | true | true; lastpipestatusretval && echo worked
# e.g. true | true | false; ! lastpipestatusretval && echo failed
# + tmppipestatus=('0' '0' '0')

pbkwee

Using a Consumer pattern vs. a constructor to populate an Enum instance.  Handy if you 
have a good number of fields and don't want long argument lists.  Or if you need to do 
some processing/method calling.

final fields would cause issues and would need to be done via a constructor without a callback.

  public enum SomeEnum {
        A((c)->{c.someField="A";}),
        B((c)->{c.lotsMoreFields="B";}),
        /*Syntax error

pbkwee

#!/bin/bash

# when triggered by server patch code, will also include our sysinfo.sh script .  A version of which is at https://gist.github.com/pbkwee/996a0c11f6d29281e58d3c42f869ef86

if [ "$1" == "--fix-vuln" ]; then
  # tag needed
  echo "dss:attemptingfix:"
  echo "dss:info: checking fix options."
  [ !  -x /usr/bin/pkexec ] && echo "dss:info: no /usr/bin/pkexec, nothing to do." && return 0 
  APT_GET_INSTALL_OPTIONS=' -y -o APT::Get::AllowUnauthenticated=yes -o Acquire::Check-Valid-Until=false -o Dpkg::Options::=--force-confnew -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confmiss '

pbkwee

#!/bin/bash
echo "dss:hostname: $(hostname)"
echo "dss:date: $(date -u)"
echo "dss:shell: $SHELL"
echo "dss:dates: $(date -u +%s)"
echo "dss:uptimes:$([ -f /proc/uptime ] && cat /proc/uptime | awk '{print $1}')"
echo "dss:uptime: $(uptime)"
echo "dss:kernel: $(uname -a)"
echo "dss:bittedness: $(getconf LONG_BIT)"
df -m | awk '{print "dss:dfm:" $0}'

pbkwee

#!/bin/bash
#
# Copyright Rimuhosting.com

function usage {
  echo " 
  $0 Creates a backup of a Linux server.  It has options to let you download that via http (else you can scp it from the source).  It has options to encrypt the backup file (e.g. via openssl or zip).
  
  Usage: $0 
    --encrypt openssl (default if using --http) | zip (not so secure) | none (default if not using --http)

pbkwee

PDU3EVN10L2130
PDU3EVN6L2130
       10,6 = cord length in feet (freedom units)

PDU3EVN10L2130
PDU3EVN6L2130
PDUMNH20HV
   PDU3 = three phase, PDU = single

PDUV30

pbkwee

apt-get install opendkim

/etc/opendkim.conf use settings like:
Domain                  domainname.com
Selector                mail
# sign, no need to verify
Mode                    s
# rsa private key
KeyFile /etc/ssl/private/dkimproxy.key
Socket                  inet:8892@localhost

pbkwee

openssl s_client -connect $ip:110 -starttls pop3

openssl s_client -connect $ip:465 | openssl x509 -text

pbkwee

#!/bin/bash
# Copyright 2018 Peter Bryant
# Licensed as https://www.apache.org/licenses/LICENSE-2.0

[ ! -z "$1" ] && [ "$1" != "--drop" ] && cat << EOJ && exit 0
Create a folders (SPAM_FOLDER=${SPAM_FOLDER:-unset} variable).  Load it up with spam.

This script searches spam folders to find IP subnets (/24s) that have a sent a good amount of spam.

Output commands to move those away and to block those IP ranges.

pbkwee

java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlRootElement
=>
--add-modules java.xml.bind

-Djava.endorsed.dirs=/usr/local/tomcat/endorsed is not supported. Endorsed standards and standalone APIs
in modular form will be supported via the concept of upgradeable modules.
Error: Could not create the Java Virtual Machine.
=>
root@ri:/usr/local/tomcat# find . | grep endors
./endorsed