![]() First execute the find command with the regular expression and verify the file order…īash$ find. If you get the regular expression wrong, it will affect the exact order in which the files are merged.Ī quick and easy way to make sure the files get merged in the exact order you want, is to use the output of another file listing program such as ls or find and pipe it to the cat command. You have to be careful about using regular expressions, if you want to preserve the order of files. This will merge all the files in the current directory that start with the name file and has a txt extension followed by the files that start with my and has a txt extension. The cat command accepts regular expressions as input file names, which means you can use them to reduce the number of arguments.īash$ cat file*.txt my*.txt > mergedfile.txt Many a time, you might have an inordinately large number of files which makes it harder to type in all the file names. The content of file3.txt is appended to the end of merged contents of file1.txt and file2.txt and so on…and the entire merged file is saved with the name mergedfile.txt in the current working directory. The above command will append the contents of file2.txt to the end of file1.txt. So, if you have several files named file1.txt, file2.txt, file3.txt etc…īash$ cat file1.txt file2.txt file3.txt file4.txt >. The order in which the file names are specified in the command line dictates the order in which the files are merged or combined. The cat command takes a list of file names as its argument. ![]() We will cover mostly the cat command in this post. ![]() It can however work only on two files at a time, and I have found it to be quite cumbersome to use. You can redirect the standard output to a file using the ‘ >‘ operator to save the output to disk or file system.Īnother useful utility to merge files is called join that can join lines of two files based on common fields. The cat command by default will concatenate and print out multiple files to the standard output. The command in Linux to concatenate or merge multiple files into one file is called cat. Whatever the reason, it is very easy to merge multiple text files into a single file in Linux. It could be that you previously split a single file into multiple files, and want to just merge them back or you have several log files that you want merged into one. ![]() Many a times you may have multiple files that needs to merged into one single file. ![]()
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