10-06-2008
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello,
I am trying to write a bash shell script that does the following:
1.Finds all *.txt files within my directory of interest
2. reads each of the files (25 files) one by one (tab-delimited format and have the same data format)
3. skips the first 10 rows of the file
4. extracts and... (4 Replies)
Discussion started by: manishabh
4 Replies
2. Shell Programming and Scripting
hello,
I will would be grateful if anyone can help me reply to my post
extract multiple cloumns from multiple files; skip rows and include filenames; awk
Please see this thread.
Thanks
manishabh (0 Replies)
Discussion started by: manishabh
0 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I'm using AWK to try to extract data from multiple files (*.txt). The script should look for a flag that occurs at a specific position in each file and it should return the data to the right of that flag.
I should end up with one line for each file, each containing 3 columns:... (8 Replies)
Discussion started by: Liverpaul09
8 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I'd like to process multiple files. For example:
file1.txt
file2.txt
file3.txt
Each file contains several lines of data. I want to extract a piece of data and output it to a new file.
file1.txt ----> newfile1.txt
file2.txt ----> newfile2.txt
file3.txt ----> newfile3.txt
Here is... (3 Replies)
Discussion started by: Liverpaul09
3 Replies
5. UNIX for Dummies Questions & Answers
Hi,
I have a directory full of *.txt files. I would like to print the last line of every file to screen.
I know you can use FNR for printing the first line of each file, but how do I access the last line of each file?
This code doesn't work, it only prints the last line of the last file:BEGIN... (5 Replies)
Discussion started by: Liverpaul09
5 Replies
6. UNIX for Dummies Questions & Answers
Hi All,
I have 7 files, each containing 9 columns separated by space. I want to extract the 9th columns from every file and save in a new file. The columns must be pasted next to each other. And the title of each columns should be the name of the corresponding files! Since the 3rd column is... (1 Reply)
Discussion started by: Unilearn
1 Replies
7. UNIX for Dummies Questions & Answers
I am trying to extract common list of Organisms from different files
For example I took 3 files and showed expected result. In real I have more than 1000 files. I am aware about the useful use of awk and grep but unaware in depth so need guidance regarding it.
I want to use awk/ grep/ cut/... (7 Replies)
Discussion started by: macmath
7 Replies
8. Shell Programming and Scripting
I have this code
awk 'NR==FNR{a=$1;next} a' file1 file2
which does what I need it to do, but for only two files. I want to make it so that I can have multiple files (for example 30) and the code will return only the items that are in every single one of those files and ignore the ones... (7 Replies)
Discussion started by: castrojc
7 Replies
9. Shell Programming and Scripting
Hi,
I have directory with multiple files from which i need to extract portion of specif lines and insert it in a new file, the new file will contain a separate columns for each file data.
Example:
I need to extract Value_1 & Value_3 from all files and insert in output file as below:
... (2 Replies)
Discussion started by: belalr
2 Replies
10. Shell Programming and Scripting
I have lots of tapes where files got written to X amount of positions per tape.
Is there a way to restore all files on the tape regardless of position ID?
Right now to restore files in the first position I do
mt -f /dev/nst0 fsf 1
tar -xvf /dev/nst0
I'd really like if there was a... (3 Replies)
Discussion started by: whegra
3 Replies
LEARN ABOUT DEBIAN
dds2index
dds2index(1) General Commands Manual dds2index(1)
NAME
dds2index - tool to create an indexfile for the use of
SYNOPSIS
dds2index [options]
DESCRIPTION
dds2index creates an index file that is required by the file extraction utility dds2tar(1). It works on tar archives stored on dds tape
devices (DAT). Since the file structure of the tape archives is used to extract the files, the archive must be an uncompressed tar ar-
chive. But compression by the transparent signal processor of the tape device is allowed.
The index created by dds2index is written to stdout by default and should normally be stored on hard disk as indexfile for later use by
dds2tar(1).
The default tape device to read from is /dev/nst0, which may be overridden with the environment variable TAPE, which in turn may be over-
ridden with the -f device option. The device must be a SCSI tape device.
OPTIONS
-f devicefile
device of the tape archive. Must be a character special file.
-t indexfile
write the index to indexfile, not to stdout.
-z,--compress
write the index in (gzip) compressed mode.
--help print some screens of online help with examples through a pager and exit immediatley.
OPTIONS you didn't really need
-b, --block-size
Set the maximal blocksize, dds2index can handle.
--z, --no-compress
Don't filter the archive file through gzip.
-v,--verbose
verbose mode. Print to stderr what is going on.
-h,--hash-mode
Print a hash sign '#' to stderr for each MB read from tape.
-V,--version
Print the version number of dds2index to stderr and exit immediately.
EXAMPLES
Example of getting the index from the default tape /dev/nst0 and storing it in file archive.idx:
dds2index -v -t archive.idx
WARNING
This program can only read records (tar is calling them tape blocks) up to 32 kbytes. A bigger buffer will cause problems with the Linux
device driver.
ENVIRONMENT
The environment variable TAPE overrides the default tape device /dev/nst0.
FILES
/dev/nst0 default tape device file. Must be a character special file.
SEE ALSO
dds2tar(1), mt(1), mt-dds(1), tar(1), gzip(1)
HISTORY
This program was created as a tool for dds2tar(1).
AUTHOR
J"org Weule (weule@cs.uni-duesseldorf.de), Phone +49 211 751409. This software is available at ftp.uni-duesseldorf.de:/pub/unix/apollo
2.4 dds2index(1)