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What do the -n and -a options do in a bash if statement? 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 …
bash - Difference between 'if -e' and 'if -f' - Stack Overflow 18 Apr 2012 · 59 $ man bash -e file True if file exists. -f file True if file exists and is a regular file. A regular file is something that isn't a directory, symlink, socket, device, etc.
How do I create a permanent Bash alias? - Ask Ubuntu 15 Dec 2010 · I would like to create an alias to rm command in order to have a confirmation message after executing this command. So I am creating an alias like this alias rm='rm -i'. But …
bash - How do I create an array in Unix shell scripting ... - Stack ... 10 Dec 2009 · For example, FreeBSD doesn't ship with bash (it's installable from ports though). Scripts written assuming bash features aren't portable, and they're noticably slower slower …
bash - How to represent multiple conditions in a shell if statement ... 30 Sep 2010 · Bash (see conditional expressions) seems to preempt the classic and POSIX meanings for -a and -o with its own alternative operators that take arguments. With some care, …
bash - What are the special dollar sign shell variables ... - Stack ... 14 Sep 2012 · In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, ./myprogram &; echo $! will return the PID of the process …
bash - What is the purpose of "&&" in a shell command? - Stack … 22 Dec 2010 · $ command one && command two the intent is to execute the command that follows the && only if the first command is successful. This is idiomatic of Posix shells, and not …
How to compare strings in Bash - Stack Overflow 10 Feb 2010 · How do I compare a variable to a string (and do something if they match)?
An "and" operator for an "if" statement in Bash - Stack Overflow Modern 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 …
bash - Shell equality operators (=, ==, -eq) - Stack Overflow It depends on the Test Construct around the operator. Your options are double parentheses, double brackets, single brackets, or test. If you use ((…)), you are testing arithmetic equality …