Can anybody explain me why when I ““apt list --installed | wc -l”” and apt list --installed | grep -c “installed” to find the installed packages there are different results?
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When use the first command, “apt list --installed | wc -l”, it will include an additional line at the top saying “WARNING: apt does not have a stable CLI interface. Use with caution in scripts.” Therefore, its result is 1 greater than the latter’s result 
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