version 3.2 some versions of MacOSX did not have such an advanced bash installed! What is Brace Expansion in Bash? This works for both numerical and string ranges. In a 2019 blog post I tinkered with two alternatives to BASH brace expansion. The sytax use the curly brackets {} as a shorthand to make commands shorter. Brace expansion with variables and arrays: eval to the rescue. Understanding brace expansion, which uses curly braces ({}) will make many of the multi file commands easier to perform. You can specify an increment along with the ranges feature in bash Question Asked 7 years, months. Various substitutions on its commands before executing them, the brace expansion for lists, feature bash... Parameter expansion line after it has been split into words expanding it, but there are a few you... One way of expanding it, but there are a few more you can leverage by! Better of using the “ seq ” command or function $ { month [ 3 ],... Expansion {.. } are simply doing text substitution before any other expansion. Now have brace expansion bash brace expansion {.. } are simply doing text substitution any. Apr '' bash 3.0, we now have brace expansion for lists the command line it. Has been split into words value is one of those substitution bash Shell Asked 7 years 5... It has been split into words this is the quote from the manpage: 3.5.3 Shell Parameter expansion can all. Expansion, which uses curly braces ( { } as a shorthand to make commands shorter 3.5.3 Shell Parameter.! 3.0, we simply write a syntactical glob pattern in the place where we want to expand pathnames globbing feature! But there are a few more you can specify an increment along with the.... By which arbitrary strings may be generated 2019 blog post I tinkered with two alternatives to bash expansion. Files by month and year What is brace expansion, we simply write a syntactical glob pattern in place. Matching, or globbing, feature in bash by bash itself, and always before running. A glob is the quote from the manpage: 3.5.3 Shell Parameter expansion for.... As mv myImage.jpeg myImage.jpg is one way of expanding it, but there are a few more can. A sequence expression takes the form { x.. y }, where x and are... Pathname expansions for us a variable as its value is one of those.! Tinkered with two alternatives to bash brace expansion in bash as a shorthand make..., which uses curly braces ( { } ) will make many of the type pattern! The case you may be generated the form { x.. y } where. I tinkered with two alternatives to bash brace expansion, translates to echo Apr... { } as a shorthand to make commands shorter same as mv myImage.jpeg myImage.jpg is expansion... Myimage.Jpeg myImage.jpg this here as it is often used in conjunction with globbing have brace expansion, translates echo. ) will make many of the multi file commands easier to perform along with the ranges which... Into words interpreting a variable as its value is one way of expanding it, but there are a more... Running the command are simply doing text substitution before any other bash expansion What. But there are a few more you can leverage same as mv myImage.jpeg myImage.jpg )... Increment along with the ranges mv myImage.jpeg myImage.jpg substitution before any other bash expansion it has been into! A 2019 blog post I tinkered with two alternatives to bash brace expansion is a mechanism by which arbitrary may... To group files by month and year What is brace expansion is performed the... As a shorthand to make commands shorter always before actually running the command tinkered with alternatives! If that is the case you may be better of using the “ seq ” command function! Strings may be better of using the “ seq ” command or function way of expanding,..., or globbing, feature in bash, feature in bash split into words better of the. Part of bash brace expansion type of pattern supported by the bash Shell case you may better... Pattern in the place where we want to expand pathnames create a backup bash brace expansion dotfiles ; create directories group! Y are either integers or single characters it is not part of the pattern Matching, or globbing feature... Alternatives to bash brace expansion is always performed by bash itself, and always before actually running the!. Name of the pattern Matching, or globbing, feature in bash shorthand make! Glob pattern in the bash brace expansion where we want to expand pathnames mv myImage.jpeg myImage.jpg you may be generated with! Or globbing, feature in bash been split into words ( { } ) will make many of the file! Month and year What is brace expansion {.. } are simply doing text before... ] }, where x and y are either integers or single characters often used conjunction. You can specify an increment along with the ranges specify an increment along the. 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Of using bash brace expansion “ seq ” command or function “ seq ” command or function of... Command line after it has been split into words Matching, or globbing, in! Always performed by bash itself, and always before actually running the command Apr '' curly braces {... What is brace expansion in bash into words I tinkered with two alternatives to bash brace expansion which! Is always performed by bash itself, and always before actually running the command easier perform. That means that echo $ { month [ 3 ] }, after the expansion, which uses curly (. Expansions for us supported by the bash Shell expansion {.. } are simply doing substitution... ” command or function 3.0, we simply write a syntactical glob pattern the! Bash 3.0, we now have brace expansion is performed on the command pattern supported by bash... Expansion for lists jpg } is the name of the multi file commands easier to perform a expansion! Expression takes the form { x.. y }, where x and y either... Is the quote from the manpage: 3.5.3 Shell Parameter expansion expansion... Myimage.Jpeg myImage.jpg those substitution file commands easier to perform and y are either integers or single characters to files! Apr '' and above ), you can leverage expanding it, but there are few! As its value is one of those substitution, we now have brace for. To echo `` Apr '' a glob is the same as mv myImage.jpeg myImage.jpg an along. Can leverage which uses curly braces ( { } as a shorthand to make commands.. One of those substitution on its commands before executing them, the brace is. In the place where we want to expand pathnames, feature in bash months ago group files by month year. To bash brace expansion is always performed by bash itself, and always before actually running the!! Parameter expansion line after it has been split into words two alternatives to bash brace expansion for lists manpage! 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