See the last few lines of post #16, above.
Note that this thread is more that a year old. Often posting to an old thread will result in no answers because nobody will look at thread that old. You'll have better luck if you start a new thread with your question. Since you seem new to Linux, I recommend that you look in the tutorials section for general information about Linux Questions and other topics. As a general answer, almost every command reads its input from the "standard input device," /dev/stdin, and sends its output to the "standard output device," /dev/stdout. (Any error messages are sent to the "standard error device," /dev/stderr.) When you're using a terminal, you're "actually" running a program called the "shell" program. Almost always, that is a program called bash, although there are several other shell programs in common use. bash, and most of the other shell programs, use redirection operators (< << <<< > >>) to change the default to some other file. (The < operators change the input, the > ones the output.) For example the command echo "Hello World!" would display Hello World on your terminal; echo "Hello World!" > example would create (or overwrite) a file called "example" (in your "current directory") containing that line. The cat command will copy a file (or a set of files) to the standard output. Here's an example: Code:
$ echo "Hello World" |
how to Generate a specifically formatted string
How do i generate codes with a specific format like
aaaAaaaaa1aa where 1 is a number a is lower case and A is upper case? im using linux and like to use bash but pearl is just as good, i was trying to use crunch but that is way too long becuase of the aaaa crap that crunch spits out, any ideas? |
( This is a 2013 thread - jamied_uk appears to have noticed that after posting and started their own thread: https://www.linuxquestions.org/questions/programming-9/how-to-generate-a-specifically-formatted-string-4175717710 )
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well done, have some Pi :D
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