LINUX

Automation

• Terraform
• Ansible

Backup

• Mysql and directory
• Limpeza
• Backup whole partition

BASH

• TLDP Advanced Bash-Scripting Guide

Boot/Instalation

Kickstart

Docs

• Kickstart Installations
• Kickstart Generator

Example

• Password generation

# mkpasswd -m sha-512 -S saltsalt -s <<< changeme
$6$saltsalt$XfDjcODbNwh18F961gnY3h57N.LVD8n2SQ1Me6kjP7kHT6Gw.3k62XiIDH0H5JIpBtLyKwQqeisy0oi3As7q3.

• Kickstart routine

lang en_US
keyboard br-abnt2
timezone America/Sao_Paulo --isUtc
rootpw $6$saltsalt$XfDjcODbNwh18F961gnY3h57N.LVD8n2SQ1Me6kjP7kHT6Gw.3k62XiIDH0H5JIpBtLyKwQqeisy0oi3As7q3. --iscrypted
#platform x86, AMD64, or Intel EM64T
reboot
text
cdrom
bootloader --location=partition --append="rhgb quiet crashkernel=auto"
zerombr
clearpart --all --initlabel
volgroup linux --pesize=4096 pv.0 
part pv.0 --fstype=lvmpv --ondisk=sda --size=35840
logvol /boot --vgname=linux --name=boot --fstype=vfat --size=1024
logvol / --vgname=linux --name=root --fstype=ext4 --size=12228
logvol /home --vgname=linux --name=home --fstype=ext4 --size=2048
logvol swap --vgname=linux --name=swap --fstype=swap --size=8192
logvol /var --vgname=linux --name=var --fstype=ext4 --size=5120
logvol /tmp --vgname=linux --name=tmp --fstype=ext4 --size=5120
network --device=enps162 --bootproto=static --ip=10.0.0.10 --netmask=255.255.248.0 --gateway=10.0.0.1 --nameserver=10.0.0.5
auth --passalgo=sha512 --useshadow
selinux --permissive
firewall --enabled --ssh
firstboot --disable
%post
echo End of installation
echo End of installation
%end
%packages
@base
%end

Disk

• MULTIPATH
• ASM
• SCAN SCSI
• IO Monitor
• BURN OPTICAL MEDIA

Excel

• Expand sheet row

FileSystem / Diretório

• Tamanho de arquivo
• Tamanho dos diretórios
• Root PV resize

File

• Troca String
• TrocaID
• Convert File

GraphViz

• CSV to GRAPH

HAPROXY

• True Zero Downtime HAProxy Reloads
• HAproxy softreload

Inventory

• Sockets vs Process

Kernel

• Enable Serial Console on boot

LOG

• DMESG EPOCH CONVERTER
• EPOCH

Links

• https://funcoeszz.net/
• https://tldp.org/

Memory

• Limpar Buffer e Cache
• Listar SWAP por processo
• Hot add ram memory
• SWAP in file

Monitor

• NMON
• NETDATA
• Dell OpenManage Server Administrator

ZABBIX

• RabbitMQ Monitor for Zabbix
• FSRO

Network

• DHCLIENT.CONF
• IP Comando
• Filtro de origem TCPDUMP
• Coleta em loop com TCPDUMP para wireshark
• DELL RACADM COLLECT
• Iptables Firewall
• Copy Methods
• WGET
• PROC_TCP
• TC
• nmap

Processos

Monitor de Threads

Security

• OpenSSL
• Ssh-Keygen
• KEEPASS
• Password Enforcing
• InSecurity

Systemctl

• Disable Desktop environment

Storage

• Get WWN

SHELL

BASH

Internal

• COPROC

External

• Bash One-Liners Explained, Part I: Working with files
• Bash One-Liners Explained, Part II: Working with strings
• Shell Parameter Expansion

Time

• TZDATA

Version Control

• GIT

Web Server

• NGINX