Join two unsorted files with POSIX?
128973
What is the portable (POSIX) way to achieve process substitution?
156063
Merge two unadjacent partitions
10311
merge csv files by first column
51175
Ordered by insertion Map in bash
43994
How can I redirect matching lines to a file, and non-matching lines to a different file?
84047
Python - Merge two lists with a simultaneous concatenation
137162
Appending two CSV files column-wise
46230
How to elegantly interleave two lists of uneven length in python?
2558
Fast way of finding lines in one file that are not in another?
23418
How do I join two lists in Java?
124823
Inserting a file into another file after the 1st occurrence of a pattern
33180
How can I merge files on a line by line basis?
15101
How do I append text to the beginning and end of multiple text files in Bash?
76293
List files sorted numerically
59985
split a large file to new file with unique file names
115226
Sort file by group of lines
156704
How to diff top lines of two files without intermediate file