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Commands tagged extract from sorted by
Terminal - Commands tagged extract - 14 results
mkdir tmp ; cd tmp ; zcat ../initrd.gz | cpio -i
2014-09-24 14:06:38
User: akiuni
Functions: cd cpio mkdir zcat
0

this command extracts an initrd files into the "tmp" directory

col() { awk '{print $('$(echo $* | sed -e s/-/NF-/g -e 's/ /),$(/g')')}'; }
2014-06-05 18:01:31
User: tekniq
Functions: awk col echo sed
0

Something I do a lot is extract columns from some input where cut is not suitable because the columns are separated by not a single character but multiple spaces or tabs. So I often do things like:

... | awk '{print $7, $8}'

... which is a lot of typing, additionally slowed down when typing symbols like '{}$ ... Using the simple one-line function above makes it easier and faster:

... | col 7 8

How it works:

The one-liner defines a new function with name col

The function will execute awk, and it expects standard input (coming from a pipe or input redirection)

The function arguments are processed with sed to use them with awk: replace all spaces with ,$ so that for example 1 2 3 becomes 1,$2,$3, which is inserted into the awk command to become the well formatted shell command: awk '{print $1,$2,$3}'

Allows negative indexes to extract columns relative to the end of the line.

Credit: http://www.bashoneliners.com/oneliners/oneliner/144/

ls --color=never -1| grep -E "[0-9]{4}"|sed -re "s/^(.*)([0-9]{4})(.*)$/\2 \1\2\3/" | sort -r
gocr -i ~/Screenshot.png
2013-02-28 07:38:13
User: totti
-3

Image to text converter.

Convert your scanned book in image format like .png, .jpg into editable text format.

OCR ==> Optical Code Reader

als some.jar
aunpack foo.tar.bz2
icotool -l demo.ico
grep "HTTP/1.1\" 404" access_log | awk '{print $7 } ' | sort | uniq -c | sort -n
gs -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dSAFER -dFirstPage=14 -dLastPage=17 -sOutputFile=OUTPUT.pdf ORIGINAL.pdf
cut -f 1 three-column.txt > first-column.txt
2010-07-11 10:13:45
User: postrational
Functions: cut
4

There is a common command for outputting a field or list of fields from each line in a file. Why wouldn't you just use cut?

awk '{print $1}' < three-column.txt > first-column.txt
while read col1 col23; do echo $col1; done < three-column.txt > first-column.txt
while read l; do echo ${l%% *}; done < three-column-list.txt > only-first-column.txt
2010-07-09 03:42:56
User: zed
Functions: echo read
1

The above is an example of grabbing only the first column. You can define the start and end points specifically by chacater position using the following command:

while read l; do echo ${l:10:40}; done < three-column-list.txt > column-c10-c40.txt

Of course, it doesn't have to be a column, or extraction, it can be replacement

while read l; do echo ${l/foo/bar}; done < list-with-foo.txt > list-with-bar.txt

Read more about parameter expansion here:

http://wiki.bash-hackers.org/syntax/pe

Think of this as an alternative to awk or sed for file operations

wrestool -x --output . -t14 /path/to/your-file.exe