bash script to collect line numbers from files in a folder
./script.sh /path/to/directory txt output.txt 1 3 5
./script.sh -r 5 /path/to/directory txt output.txt 1 3 5
In regular mode, the script loops over all text files in the directory, and for each file, extracts the requested line numbers and appends them to the output file.
In random mode (enabled with the -r flag), the script first randomly shuffles the files in the directory, then extracts line numbers from the first N files, where N is provided as the argument to the -r flag.
The arguments to the script are as follows:
-r: (optional) Enable random mode. The next argument should be the number of files to read./path/to/directory: The directory to look for files to read.txt: The file extension of the files to read.output.txt: The file to write the output to.1 3 5: A list of line numbers to extract from each file. Can be any number of line numbers.