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You can change the format strings in clock to eliminate the leading zero. This prevents expr from interpreting the numbers as octal values.

 

 

So if you replace %H with %k:

 

 

Hour in 24-hour format, without leading zeros (0 - 23).

 

 

Per the clock man page (Click here), it doesn't look like there is an option for minutes without the leading zero. You could manually strip them using string trimleft:

 

 

string trimleft 0000123 0

 

 

123

 

 

Aaron