What does NE 0 mean?
-ne 0. checks that the thing on the left ( $? ) is “not equal” to “zero”. In UNIX, a command that exits with zero succeeded, while an exit with any other value (1, 2, 3…
What does ne mean in shell script?
not equal
Following the reference to “Bash Conditional Expressions” will lead you to the description of -ne , which is the numeric inequality operator (“ne” stands for “not equal).
What is $? == 0 in shell script?
$? is the exit status of the most recently-executed command; by convention, 0 means success and anything else indicates failure. That line is testing whether the grep command succeeded. The grep manpage states: The exit status is 0 if selected lines are found, and 1 if not found.
What is the meaning of 0 in Unix?
A zero exit status traditionally means “success”, which is different things for different programs. cat exits with zero status under almost any circumstance, with grep exits with zero status if it finds a match. So, whatever command your script last ran, the script checks exit status.
What is RC in bash?
It stands for “run commands.” From Wikipedia: The term rc stands for the phrase “run commands”. It is used for any file that contains startup information for a command.
What’s the difference between positive and negative test results?
These results are usually written as “positive” or “negative.” In this case, positive doesn’t necessarily mean “good” and negative doesn’t necessarily mean “bad.” Instead: Positive: The lab found whatever your doctor was testing for.
What happens if your blood test results are below the minimum?
If your test shows you are below the minimum numbers, you may be suffering from hypothyroidism, or low thyroid. If your scores are above the normal range, you may have an overly active thyroid, or hyperthyroidism. In either case, your physician can advise you on appropriate medication.
What does it mean when your test results are inconclusive?
Sometimes, the result might be “inconclusive.” That means the lab doesn’t have a clear yes or no answer based on your sample. Your doctor may want you to do the test again or have another kind of test. Reference Ranges.
What does it mean when your lab results come back?
If you’re waiting for lab test results to come back or you’re trying to figure out what they mean, the process and all those medical terms and numbers can be confusing. There are thousands of lab tests, and their results can mean different things. But a few general guidelines can help shed some light.