以下は、摂氏をケルビンに変換するPOSIXシェルスクリプトです。
```
#!/bin/sh

# Take the temperature in celsius from the user
echo Enter temperature in Celsius
read -r temperature_celsius

# Convert the temperature from celsius to kelvin
temperature_kelvin="$(echo "$temperature_celsius+273.15" | bc)"

# Print the converted temperature
echo Temperature in Kelvin\: $temperature_kelvin
```
Sure. Here is a POSIX Shellscript that converts Celsius to Kelvin.
```
#!/bin/sh

# Take the temperature in celsius from the user
echo Enter temperature in Celsius
read -r temperature_celsius

# Convert the temperature from celsius to kelvin
temperature_kelvin="$(echo "$temperature_celsius+273.15" | bc)"

# Print the converted temperature
echo Temperature in Kelvin\: $temperature_kelvin
```