sati2013

README

Let Tomcat is download and installed under /opt/tomcat. Also, let tomcat be a non-provileged user under which the server will be running.

We assume that we keep server's binaries under /opt/tomcat and we will create a server instance named foo under /var/tomcat/ (carrying its own conf, logs, webapps, work, lib directories). See also https://dzone.com/articles/running-multiple-tomcat.

Create a template service unit file at /etc/systemd/system/tomcat@.service:

sati2013

# Simple No-ip.com Dynamic DNS Updater
#
# By Nathan Giesbrecht (http://nathangiesbrecht.com)
#
# 1) Install binary as described in no-ip.com's source file (assuming results in /usr/local/bin)
# 2) Run sudo /usr/local/bin/noip2 -C to generate configuration file
# 3) Copy this file noip2.service to /etc/systemd/system/
# 4) Execute `sudo systemctl enable noip2`
# 5) Execute `sudo systemctl start noip2`
#

sati2013

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

sati2013

push_key() {
    ssh-add -L | ssh ${1} "umask 077; [ -d .ssh ] || mkdir .ssh; cd .ssh; cat >> authorized_keys;ls -la authorized_keys"
}

sati2013

netstat -an | awk '{print $7}' | sort | uniq -c

sati2013

#!/usr/bin/python

# All SSH libraries for Python are junk (2011-10-13).
# Too low-level (libssh2), too buggy (paramiko), too complicated
# (both), too poor in features (no use of the agent, for instance)

# Here is the right solution today:

import subprocess
import sys

sati2013

#!/usr/bin/perl
use strict;
use warnings;


use Getopt::Long qw(GetOptions);

my %opts;

GetOptions(\%opts,

sati2013

#!/bin/bash
perl -MFile::Find=find -MFile::Spec::Functions -Tlwe 'find { wanted => sub { print canonpath $_ if /\.pm\z/ }, no_chdir=>1},@INC'

sati2013

for i in user1 user2 user3...

do 

echo -n 'useradd -m -s /bin/bash -u '$(grep $i /etc/passwd | cut -d':' -f3) && echo -en ' \
-p' \'$(grep $i /etc/shadow | cut -d ':' -f2)\' $i '\n'

done

Output :