Clever Geek Handbook

Paste linux script

I have a small question and I will be grateful for your help.

I need to concatenate different text files together using the paste command:

paste -d, ~/Desktop/*.txt  > ~/Desktop/Out/merge.txt

However, the files were leaked out of order. (text files are numbered 1, 2, 3, etc.)

I use *.txt

as there are different number of files for different scenarios.

Could you please help me with this.

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3 answers


Here's a rather long way to do the same thing, but on one line.

paste -d, $(ls ~/Desktop/*.txt | awk -F/ '{print $NF"/"$0}' | sort -n | cut -d/ -f2-) > ~/Desktop/merge.txt


I like one liner :-)

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If you are using modern bash you can write:

paste -d, ~/Desktop/{1..10}.txt  > ~/Desktop/Out/merge.txt

If not, you should use something like:

paste -d, $(seq 1 10 | sed 's@.*@~/Desktop/&.txt) > ~/Desktop/Out/merge.txt

If you don't know what files you have in the directory, you can list and sort them:



cd ~/Desktop/
paste -d, $(ls -1d *.txt| sort -n) > ~/Desktop/Out/merge.txt

Example:

$ touch {1..20}.txt
$ echo $(ls -1 | sort -n)
1.txt 2.txt 3.txt 4.txt 5.txt 6.txt 7.txt 8.txt 9.txt 10.txt 11.txt 12.txt 13.txt 14.txt 15.txt 16.txt 17.txt 18.txt 19.txt 20.txt

Example 2:

$ echo hello > 1.txt
$ echo dear > 5.txt
$ echo friend > 11.txt
$ paste -d, $(ls -1d *.txt| sort -n)
hello,dear,friend
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paste -d, $(ls ~/Desktop/*.txt) > ~/Desktop/Out/merge.txt


* Replaced by an alphabetically sorted list of your directory's filenames.

3.5.8 File name extension

Bash scans every word for '*,'? and '[. If one of these characters appears, that word is treated as a pattern and is replaced with an alphabetically sorted list of filenames matching the pattern.

So, the filename doesn't have to be sequential;)

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