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- nounbash (noun) · bashes (plural noun)Originmid 17th century (as a verb): imitative, perhaps a blend of bang and smash, dash, etc..
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Meaning of $? (dollar question mark) in shell scripts
Bash $$ Variable: What Does It Mean? How Can You Use it?
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This is the exit status of the last executed command.
For example the command true always returns a status of 0 and false always returns a status of 1:
trueecho $? # echoes 0falseecho $? # echoes 1From the manual: (acessible by calling man bash in your shell)
? Expands to the exit status of the most recently executed foreground pipeline.
By convention an exit status of 0 means success, and non-zero return status means failure. Learn more about exit statuses on wikipedia.
There are other special variables like this, as you can see on thi...
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