两个Onelinner For Cycle用于列表和grep Bash

Question

I have a list of files with the following schema

YYYYMMDD.tar.gz

And I want to zcat to each one of them (I dont have zgrep) and then grep each one of them like this

grep --color=always "STRING" | grep 29000000.00 | grep --color=always string

For the zcat the below is working:

for archivos in $(ls -ltrh 2017091*.tar.gz); do zcat $archivos ; done

If I nested in two for cycles:

for archivos in $(ls -ltrh 2017091*.tar.gz)
do 
    for subarchivos in $(zcat $archivos)
    do 
        grep --color=always 29000000.00
    done
done

And I get

gzip: invalid option -- 'w'
Try `gzip --help' for more information.
gzip: 1.gz: No such file or directory
gzip: file.gz: No such file or directory
gzip: file.gz: No such file or directory
gzip: 357M.gz: No such file or directory
gzip: file3.gz: No such file or directory
gzip: 11.gz: No such file or directory
gzip: 00:00.gz: No such file or directory

And just stays there I think is to heavy and is taking a lot of time and I cannot see if it is really working could someone help me?

Answer 1

 for archivos in $(ls -ltrh 2017091*.tar.gz); do zcat $archivos ; done 

If you're going to parse ls's output you need to leave out all of those flags. You only want it to print file names, not sizes and permissions and such. Get rid of -ltrh .

Except, really, you shouldn't parse the output of ls. Instead, just pass all the file names to zcat.

zcat 2017091*.tar.gz

If I nested in two for cycles:

 for archivos in $(ls -ltrh 2017091*.tar.gz) do for subarchivos in $(zcat $archivos) do grep --color=always 29000000.00 done done 

You wouldn't want to run grep repeatedly. Instead, you want to run a series of zcat s and pipe the output of all of them to grep. To do that, you'd pipe the entire for loop to grep :

for archivos in $(ls -ltrh 2017091*.tar.gz)
do
    zcat "$archivos"
done | grep --color=always 29000000.00

And then as discussed above, you don't need a for loop at all.

zcat 2017091*.tar.gz | grep --color=always 29000000.00

For what it's worth, I don't recommend using --color=always . If you pipe your script's output to more commands for additional processing the color codes will mess things up. --color=auto is better.

zcat 2017091*.tar.gz | grep --color=auto 29000000.00