bash
Get flash to fully experience Pearltrees
Bash For Loop Examples
H ow do I use bash for loop to repeat certain task under Linux / UNIX operating system? How do I set infinite loops using for statement? How do I use three-parameter for loop control expression? A 'for loop' is a bash programming language statement which allows code to be repeatedly executed. A for loop is classified as an iteration statement i.e. it is the repetition of a process within a bash script. For example, you can run UNIX command or task 5 times or read and process list of files using a for loop.
One very common task when scripting with bash is to use a for loop to iterate over the contents of a directory or directory tree. There are two primary methods of accomplishing this task; using ls and using find . We’ll not consider the manual method as that would be completely unworthy of our attention.
Bash Tip! for loop on directory listing « ITSA Blog
Associated with each individual row is a data file containing a subset of additional data for that row. These associated data files are single column files, but not all have the same number of columns. For example that data file associated with row 1 might be of form: Is there a way that I can pass the data file above (R1a, etc) to a for loop within a bash script such that it loops over the lines of the data file and outputs the following:
how to loop over text file lines within bash script for loop?
I want to write a bash script which will use a list of all the directories containing specific files. I can use find to echo the path of each and every matching file. I only want to list the path to the directory containing at least one matching file.