README.md

Linux-System-Management-Scripts-Tricks

Linux System Administrator & Engineer Certification Tricks Management Scripts

Linux Security & Linux Hardening & Linux Management & Linux Configuration

Information

• cpu info
• kernel info
• ram info
• disk info
• gpu info
• network info

User Management

• sudo rights
• sudo rights without password
• user add with skeleton directory
• user add without home directory, no group, no shell
• user disk quota
• force user to change password
• lock user after failed login attempts
• join ldap as a client
• alias creator (mkalias)

Network Configuration

• ifconfig mtu change layer2
• ip link mtu change layer2
• ip route add
• rename network interface
• ip addr static ip
• ifconfig static ip
• dns nameservers
• netplan static ip
• join wifi network
• ip link change mac address
• ifconfig change mac address
• static routing netplan
• give bind permission

Remote Access

• ssh key-based authentication
• ssh two factor authentication
• ssh alias
• vnc server
• vnc client
• parallel-ssh
• parallel-ssh options

HTTP Servers

• apache vhost
• apache basic authentication
• apache restrict extensions
• apache reverse proxy
• nginx reverse proxy
• nginx reverse proxy body
• htaccess

Proxy Servers

• squid installation
• squid cache proxy
• squid acl access restrictions
• squid spoofing headers
• squid removing headers
• squid acl block-list
• squid ssl config
• squid service

File Operations

• user vsftpd configuration
• anonymous vsftpd configuration
• samba anonymous file sharing
• rsync over ssh
• nfs file sharing

Disk I/O

• raid info
• raid setup
• swap space
• raid hot spares
• encrypt swap space
• add logical volume
• add physical volume
• add volume group
• extend logical volume
• extend volume group
• change physical volume
• delete a partition
• shrink a partition

DNS Servers

• authoritative dns service
• forwarding dns service
• dns service version hiding
• disable dns recursion
• restrict zone transfer

DHCP Servers

• dhcp server configuration
• dhcp server change interface
• dhcp static host-ip
• disable dynamic dns
• deny dhcpdecline messages

Firewall Service

• iptables basics
• iptables rules for a single user
• iptables persistent save
• iptables port forwarding
• nftables basics
• iptables as a service

Hardening

• apache trace-track
• apache server signature
• randomized layout of virtual address space
• openscap
• sftp deny deletion
• squid remove headers
• rsyslog

Installation

• pihole setup
• pihole second dns
• wordpress installation
• limesurvey installation
• owncloud installation
• nextcloud installation
• gophish installation
• revive adserver installation

Others

• bash ignore duplicate entries
• kill zombie processes
• redis server performance
• hide the grub menu
• rsyslog server configuration
• rsyslog client configuration
• mysql access denied error
• mongodb backup and restore
• fail2ban
• bash terminal timestamp
• user limits
• disable usb ports
• install selfsign certificate