Overview This Bash script provides a robust set of tools for Linux system administration, designed to simplify complex management tasks.
Features
🔐 User and Group Management
🚀 Service Control - 🌐 Network Configuration
📦 Package Management
🔥 Firewall Administration
⏰ Job Scheduling
💽 Advanced LVM Management
📂 Filesystem Management
🗃️ RAID Configuration
🛡️SELinux Management
Prerequisites
Linux distribution (CentOS/RHEL recommended)
sudo privileges
systemd
firewalld
mdadm
LVM tools
#!/bin/bash
# Define colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color
# Helper function to pause and return to menu
pause() {
read -p "Press [Enter] key to continue..."
}
# Manage Users and Groups
manage_users_groups() {
echo -e "${GREEN}Manage Users and Groups...${NC}"
echo "1. Add User"
echo "2. Delete User"
echo "3. Set User Password"
echo "4. Add Group"
echo "5. Delete Group"
echo "6. Assign User to Group"
read -p "Select an option: " ug_option
case $ug_option in
1)
read -p "Enter username: " username
sudo useradd "$username"
echo "User $username added."
;;
2)
read -p "Enter username to delete: " username
sudo userdel "$username"
echo "User $username deleted."
;;
3)
read -p "Enter username to set password: " username
sudo passwd "$username"
;;
4)
read -p "Enter group name: " group
sudo groupadd "$group"
echo "Group $group added."
;;
5)
read -p "Enter group name to delete: " group
sudo groupdel "$group"
echo "Group $group deleted."
;;
6)
read -p "Enter username: " username
read -p "Enter group name: " group
sudo usermod -aG "$group" "$username"
echo "User $username added to group $group."
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Manage Services
manage_services() {
echo -e "${GREEN}Manage Services...${NC}"
echo "1. Start Service"
echo "2. Stop Service"
echo "3. Restart Service"
echo "4. Enable Service"
echo "5. Disable Service"
echo "6. Check Service Status"
read -p "Select an option: " service_option
read -p "Enter service name: " service
case $service_option in
1) sudo systemctl start "$service" ;;
2) sudo systemctl stop "$service" ;;
3) sudo systemctl restart "$service" ;;
4) sudo systemctl enable "$service" ;;
5) sudo systemctl disable "$service" ;;
6) sudo systemctl status "$service" ;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Manage Network
manage_network() {
echo -e "${GREEN}Manage Network...${NC}"
echo "1. View Network Configuration"
echo "2. Restart Network"
read -p "Select an option: " net_option
case $net_option in
1) ip addr show ;;
2) sudo systemctl restart NetworkManager ;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Manage Packages
manage_packages() {
echo -e "${GREEN}Manage Packages...${NC}"
echo "1. Install Package"
echo "2. Remove Package"
echo "3. Update System"
read -p "Select an option: " pkg_option
case $pkg_option in
1)
read -p "Enter package name to install: " pkg
sudo yum install -y "$pkg"
;;
2)
read -p "Enter package name to remove: " pkg
sudo yum remove -y "$pkg"
;;
3) sudo yum update -y ;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Manage Firewall
manage_firewall() {
echo -e "${GREEN}Manage Firewall...${NC}"
echo "1. Start Firewall"
echo "2. Stop Firewall"
echo "3. Enable Firewall"
echo "4. Disable Firewall"
echo "5. Add Firewall Rule"
echo "6. Remove Firewall Rule"
read -p "Select an option: " fw_option
case $fw_option in
1) sudo systemctl start firewalld ;;
2) sudo systemctl stop firewalld ;;
3) sudo systemctl enable firewalld ;;
4) sudo systemctl disable firewalld ;;
5)
read -p "Enter rule (e.g., port/service): " rule
sudo firewall-cmd --permanent --add-service="$rule"
sudo firewall-cmd --reload
;;
6)
read -p "Enter rule to remove (e.g., port/service): " rule
sudo firewall-cmd --permanent --remove-service="$rule"
sudo firewall-cmd --reload
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Manage Jobs (cron, at)
manage_jobs() {
echo -e "${GREEN}Manage Jobs...${NC}"
echo "1. Schedule Cron Job"
echo "2. Schedule At Job"
read -p "Select an option: " job_option
case $job_option in
1)
echo "Enter cron job in the format: * * * * * /path/to/script"
read -p "Enter cron job: " cronjob
(crontab -l 2>/dev/null; echo "$cronjob") | crontab -
echo "Cron job scheduled."
;;
2)
echo "Enter the command to schedule (e.g., ls)"
read -p "Enter command: " cmd
read -p "Enter time (e.g., now + 1 minute): " time
echo "$cmd" | at "$time"
echo "At job scheduled."
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Advanced LVM Management
manage_lvm_advanced() {
echo -e "${GREEN}Advanced LVM Management...${NC}"
echo "1. Create Physical Volume (PV)"
echo "2. Create Volume Group (VG)"
echo "3. Create Logical Volume (LV)"
echo "4. Extend Logical Volume"
read -p "Select an option: " lvm_option
case $lvm_option in
1)
read -p "Enter disk (e.g., /dev/sdb): " disk
sudo pvcreate "$disk"
echo "Physical Volume created on $disk."
;;
2)
read -p "Enter volume group name: " vg_name
read -p "Enter physical volume (e.g., /dev/sdb): " pv
sudo vgcreate "$vg_name" "$pv"
echo "Volume Group $vg_name created."
;;
3)
read -p "Enter logical volume name: " lv_name
read -p "Enter volume group: " vg
read -p "Enter size (e.g., 10G): " size
sudo lvcreate -L "$size" -n "$lv_name" "$vg"
echo "Logical Volume $lv_name created."
;;
4)
read -p "Enter logical volume path (e.g., /dev/vg/lv): " lv_path
read -p "Enter size to extend (e.g., +5G): " size
sudo lvextend -L "$size" "$lv_path"
sudo resize2fs "$lv_path"
echo "Logical Volume extended."
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Advanced Filesystem Management
manage_filesystems_advanced() {
echo -e "${GREEN}Advanced Filesystem Management...${NC}"
echo "1. Create Filesystem"
echo "2. Resize Filesystem"
read -p "Select an option: " fs_option
case $fs_option in
1)
read -p "Enter partition or volume (e.g., /dev/sdb1): " partition
sudo mkfs.ext4 "$partition"
echo "Filesystem created on $partition."
;;
2)
read -p "Enter filesystem path (e.g., /dev/vg/lv): " fs_path
sudo resize2fs "$fs_path"
echo "Filesystem resized."
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Advanced RAID Management
manage_raid_advanced() {
echo -e "${GREEN}Advanced RAID Management...${NC}"
echo "1. Create RAID Array"
echo "2. Remove RAID Array"
read -p "Select an option: " raid_option
case $raid_option in
1)
read -p "Enter RAID level (e.g., 0, 1, 5): " level
read -p "Enter devices (e.g., /dev/sd{b,c,d}): " devices
sudo mdadm --create --verbose /dev/md0 --level="$level" --raid-devices=$(echo "$devices" | wc -w) $devices
echo "RAID array created."
;;
2)
read -p "Enter RAID array (e.g., /dev/md0): " array
sudo mdadm --stop "$array"
sudo mdadm --remove "$array"
echo "RAID array removed."
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Manage SELinux
manage_selinux() {
echo -e "${GREEN}SELinux Management...${NC}"
echo "1. View SELinux Status"
echo "2. Change SELinux Mode"
echo "3. Manage SELinux Contexts"
read -p "Select an option: " selinux_option
case $selinux_option in
1) sudo sestatus ;;
2)
echo "Change SELinux Mode (enforcing, permissive, disabled)"
read -p "Enter mode: " mode
sudo setenforce "$mode"
;;
3)
echo "Manage SELinux Contexts"
# Add SELinux context management logic
;;
*)
echo -e "${RED}Invalid option.${NC}"
;;
esac
pause
}
# Main Menu
while true; do
echo -e "${GREEN}RHCSA Administration Script${NC}"
echo "1. Manage Users and Groups"
echo "2. Manage Services"
echo "3. Manage Network"
echo "4. Manage Packages"
echo "5. Manage Firewall"
echo "6. Manage Jobs"
echo "7. Advanced LVM Management"
echo "8. Advanced Filesystem Management"
echo "9. Advanced RAID Management"
echo "10. SELinux Management"
echo "11. Exit"
read -p "Select an option: " choice
case $choice in
1) manage_users_groups ;;
2) manage_services ;;
3) manage_network ;;
4) manage_packages ;;
5) manage_firewall ;;
6) manage_jobs ;;
7) manage_lvm_advanced ;;
8) manage_filesystems_advanced ;;
9) manage_raid_advanced ;;
10) manage_selinux ;;
11) exit 0 ;;
*) echo -e "${RED}Invalid option selected.${NC}" ;;
esac
done
Usage
vim admin_script.sh
chmod +x admin_script.sh
sudo ./admin_script.sh