System Administration Calculators

20 free system administration calculators in Linux.

APT Cache CalculatorCalculate disk space consumed by the APT package cache and downloaded .deb archives.
Boot Time CalculatorBreak down system boot time across firmware, kernel and systemd unit startup phases.
Journalctl Disk Usage CalculatorCalculate systemd journal disk usage against SystemMaxUse and runtime journal limits.
Kernel Log Size CalculatorCalculate dmesg kernel ring buffer size and message retention capacity.
Kernel Parameter CalculatorCalculate recommended sysctl kernel parameter values for a given workload profile.
Kernel Thread CalculatorCalculate the number of kernel threads spawned per CPU core for common kernel subsystems.
Linux Server Health Score CalculatorCalculate an overall server health score from CPU, memory, disk and service uptime metrics.
Log Growth CalculatorEstimate application log directory growth rate and days until disk capacity is reached.
Module Dependency CalculatorCalculate kernel module load order and dependency depth from modinfo dependency chains.
Package Dependency CalculatorCalculate total download size and install order for a package and its dependency tree.
Package Size CalculatorEstimate installed size versus download size for a software package and its dependencies.
Patch Window CalculatorCalculate the maintenance window duration needed to patch a fleet of servers safely.
Reboot Duration CalculatorEstimate total server downtime from shutdown, POST, kernel boot and service startup phases.
Repository Mirror CalculatorCalculate storage and bandwidth needed to host a local mirror of a package repository.
Server Consolidation CalculatorCalculate how many physical servers can be consolidated into virtual machines or containers.
Service Availability CalculatorCalculate service uptime percentage and allowed downtime budget for an SLA target.
Syslog Storage CalculatorCalculate storage required for centralized syslog collection from a fleet of hosts.
System Capacity PlannerPlan overall CPU, memory and storage capacity needed to support projected system growth.
Update Time EstimatorEstimate total time to download and install a batch of system package updates.
YUM DNF Cache CalculatorCalculate disk space consumed by the YUM or DNF package manager metadata and RPM cache.