True and false (commands) True and false (commands) In Unix-like operating systems, codice_1 and codice_2 are commands whose only function is to always return with a predetermined exit status. Programmers and scripts often use the exit status of a command to assess success (exit status zero) or failure (non-zero) of the command. The codice_1 and codice_2 commands represent the logical values of command success, because "true" returns 0, and "false" returns 1. The commands are usually employed in conditional statements and loops of shell scripts. For example, the following shell script repeats the "echo hello" loop until interrupted: while true do done The commands
Pet food the 2007 pet food crisis, melamine used in coatings for pet food cans can migrate into the food. Therefore, the regular melamine migration limit (SML) of 2.5 mg/Kg for food and feed has been expanded to pet food. This limit is valid for canned wet pet food on an ‘as sold’ basis. The 2007 pet food recalls involved the massive recall of many brands of cat and dog foods beginning in March 2007. The recalls came in response to reports of kidney failure in pets consuming mostly wet pet foods made with wheat gluten from a single Chinese company, beginning