Bash Shell Scripting W3schools

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Bash Shell Scripting W3schools

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Bash Shell Scripting YouTube

Dec 22 2010 nbsp 0183 32 command one amp amp command two the intent is to execute the command that follows the amp amp only if the first command is successful This is idiomatic of Posix shells and not only found in Bash It intends to prevent the running of the second process if the first fails You may notice I ve used the word quot intent quot that s for good reason The switches -a and -n are not strictly part of a bash if statement in that the if command does not process these switches. What are primaries? I call them "switches", but the bash documentation that you linked to refers to the same thing as "primaries" (probably because this is a common term used when discussing parts of a boolean expression).

How Do I Read User Input Into A Variable In Bash Shell Scripting

Bash Shell Scripting W3schoolsModern shells such as Bash and Zsh have inherited this construct from Ksh, but it is not part of the POSIX specification. If you're in an environment where you have to be strictly POSIX compliant, stay away from it; otherwise, it's basically down to personal preference. Bash variables are untyped so quot yes quot eq quot no quot is equivalent to quot yes quot eq 0 or quot yes quot eq quot any noninteger string quot All True The eq forces integer comparison

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