DavidOsipov

# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.

####################### General Kernel Parameters #######################
#kernel.domainname = example.com
#kernel.printk = 3 4 1 3 # Uncomment to stop low-level messages on console


####################### Kernel Hardening Parameters #####################

Bambarello

#!/bin/bash
set -e

export PATH="/root/.local/share/solana/install/active_release/bin:$PATH"
  
TEXTFILE_COLLECTOR_DIR=/var/lib/prometheus/node-exporter
FILENAME=solana_active_stake.prom
metrics_prefix=solana_monit_mainnet

ALL=$(timeout 45 solana validators --output json | jq -r '.currentValidators[] |[.identityPubkey, .activatedStake/1000000000] | @csv'  )

Bambarello

# Fail2Ban configuration file
#
# NOTE
# You should set up in the jail.conf file, the maxretry and findtime carefully in order to avoid false positives.
#
# Author: http://www.go2linux.org
# Modified by: samnicholls.net
#    * Mon 6 Jun 2016 - Updated failregex to capture HOST group correctly

[Definition]

zettacristiano

# Fail2Ban configuration file
#
# NOTE
# You should set up in the jail.conf file, the maxretry and findtime carefully in order to avoid false positives.
#
# Author: http://www.go2linux.org
# Modified by: samnicholls.net
#    * Mon 6 Jun 2016 - Updated failregex to capture HOST group correctly

[Definition]

Nihhaar

Linux simple performance tweaks

Change the I/O Scheduler

Open $ vim /etc/default/grub then add elevator=noop next to GRUB_CMDLINE_LINUX_DEFAULT. Run $ update-grub and $ cat /sys/block/sda/queue/scheduler to be sure that noop is being used:

$ vim /etc/default/grub
$ update-grub
$ cat /sys/block/sda/queue/scheduler

[noop] deadline cfq

gfoss

#search for invalid logon attempts, pull out IP, remove dupes, sort...
$ grep -rhi 'invalid' /var/log/auth.log* | awk '{print $10}' | uniq | sort > ~/ips.txt

#look em up
$ for i in `cat ~/ips.txt`; do @nslookup $i 2>/dev/null | grep Name | tail -n 1 | cut -d " " -f 3; done > ~/who.txt

# :-) #
$ do moar things...

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname