General :: Parsing Columns In Bash / Extract The First Set Of Numbers And Get Them To Appear Only Once?
Sep 28, 2009
as a result of a find command, i have
852065 72: /bin/gunzip
852065 72: /bin/gzip
852065 72: /bin/zcat
(the first column is inode number and the second is size if you're curious)
I want to be able to format it in a way such that:
852065 72:
/bin/gunzip
/bin/gzip
/bin/zcat
I know I can get the bottom half using awk- but I can't figure out how to extract the first set of numbers and get them to appear only once
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Oct 14, 2010
I have a bash variable where the content looks like this where ;f1; and ;f2; are delimiters:
;f1;field1value1;f2;field2 value1 ;f1;field1value2;f2;field2 value2 ;f1;field1value3;f2;field2 value3
So what I need is to extract and put into variables each combination of f1 and f2 in a loop to something like that:
#first pass of the loop I need:
f1=field1value1
f2=field2 value1
#second pass of the loop I need:
f1=field1value2
f2=field2 value2
# third pass of the loop I need:
f1=field1value3
f2=field2 value3
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Oct 13, 2010
I have a config file called hosts.cfg.
It contains entries like this:
Quote:
There are many more of these entries in the file, over 500, all in this same format: each host has a "define host" followed by 18 directives contained in squiggly brackets.
If I want to know all the hosts that are in the hostgroup called SERVER_GRP, I suppose I would need to read every hostgroups line (8th directive in squiggly brackets) that contains SERVER_GRP and output the corresponding host_name line (1st directive in squiggly brackets) from that entry.
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Jul 29, 2011
I would like to transform rows into columns from a file in bash.
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Jan 15, 2010
fakeFile's contents :
Code:
blah $(date +%F) blah
fakeScript's contents :
Code:
while read line; do
echo $line
done < "fakeFile"
so here's the problem : is there any way to evaluate the fakeFile's contents (in the fakeScript), so that the term "$(date +%F)" (or any other bash script) in a string , translates to it's corresponding value ? (in this example , we want to have "blah current date" instead of " blah $(bash script) blah " )
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Jul 27, 2011
I've searched everywhere and I can't come up with a good solution. For each line I need to find the average, min, and max. I've seen plenty of solutions where the number of columns is fixed, unfortunately for me these lines can get pretty large. My thought was to read each line individually into an array, loop through the array and find the avg, min, and max that way but i haven't had much luck. I can read each line using a while loop but I'm having trouble with the array part, or perhaps that's not the best solution?
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Jun 17, 2010
I've been looking though different editors for one that has good printing support. Ideally it should be able to print C++ code with line numbers, syntax highlighting, multiple columns per page, customizable fonts and sizes and a print preview feature so that I can make sure it looks right before sending it to the printer. It appears that notepad++ had at least some of these features, but it is not available on linux. The best I could do so far is to copy/paste the output of 'cat -n foo.cpp' into oowriter and format it into two colums. I don't get synax highlighting though and I have to manually replace tabs with a few spaces as well as some excessive leading spaces before the line numbering.
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Dec 22, 2010
I am trying to extract 2 numbers from a same file and my goal is to print them both in another file, on the same line, separated with a space. I have to do that for 20 files and I would like to have therefore 20 lines like this in the output file. It would look like this :
Quote:
number1_file1 number2_file1
number1_file2 number2_file2
...
...
number_1_file20 number2_file20
So far, I did only extract one number and got an output file like this :
Quote:
number1_file1
number1_file2
...
...
number1_file20
And I did this by running a bash script with the following content :
Code:
#!/bin/bash
ls execution$1$2*.* | while read filename
do
cat $filename | grep -e "Total aborts:" | cut -d " " -f3 >> abort$1$2.dat
done
$1 and $2 are just strings to identify the different files I want to consider in this loop. This script works well to extract a number which is the 3rd field of a line starting with "Total aborts:".Now, how could I change this script to do what I mentioned above (i.e. extracting two numbers from two different lines) ? The second number is the 3rd field of a line starting with "Total throughput:"
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Oct 26, 2010
i am trying to get a script that i'm calling to have information from a sql populate into rows... but i'm not getting the data to output correctly into the rows. can someone please help?
<table>
<thead>
<tr>
<th>Name</th>
<th>Help</th>
<th>Folder</th>
code....
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Nov 16, 2010
Our assignment is to take in two numbers and add them. While the inputs will always be numbers, we are to inform the user if they are doing it wrong. My code:
[Code]....
The code worked fine before I tried to idiot-proof it. I'll probably end up nesting the if statements checking if the first two inputs are not null, but I'm more annoyed at why the script isn't working.
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Nov 4, 2010
I have to read a couple of numbers from a random.txt file. In this .txt file there are random numbers. They are separated by a space. Example if you opened test.txt:
test.txt :1 6 1 3 6 8 10 2 4
I would like to read those numbers using CAT and store them into an array:
numlen=${#num[*]} - (must be like this because it is a part of a larger program)
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Mar 17, 2011
I've these path:
Code:
xxx/yyy/zzz/0908/aaa/a.txt
xxx/yyy/zzz/0909/aaa/a.txt
xxx/yyy/zzz/0910/aaa/a.txt
fff/ggg/hhh/iii/jjj/0911/aaa/a.txt
fff/ggg/hhh/kkk/0912/aaa/a.txt
and I would like to extract only the number, so that I've get the result
Code:
0908
0909
0910
0911
0911
How can I do it in bash?
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Sep 10, 2010
Using normal bash tools (ie, built-ins or commonly-available command-line tools), is it possible, and how to extract/save attachments on emails?
For example, say I have a nightly report which arrives via email but is a zip archive of several log files. I want to save all those zips into a backup directory. How would I accomplish that?
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Apr 13, 2011
I have 2 very long files which are quite similar:
file1.csv:
Code:
file2.csv:
Code:
I need this output:
Code:
explanation:
If the fields 3 (serie) and 4 (modello) are identical, the lines of the 2 files should be "added":
Code:
If the fields 3 (serie) and 4 (modello) are different, just print the line of both files:
Code:
Is there a way to do this without reading the (huge) files with a "while read line" loop?
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Apr 27, 2011
We have a system called Skynet, which is basically a bunch of monitoring tools, including Nagios. What I want to do is output the status of 'critical' processes in conky. The conky part I'll worry about later (how hard can that be?), but I'm looking for some feedback on how I'm parsing the initial data. I figure that the simplest way to get the information is to query the cgi, then take what I need from the results...
Code:
wget -O - "http://user:pass@skynet/nagios/cgi-bin/status.cgi?status.cgi?host=all&servicestatustypes=16&hoststatustypes=3"| grep -i "<TD ALIGN=LEFT valign=center CLASS='statusBGCRITICAL'><A HREF='extinfo.cgi?type=2&host="
[Code]...
All I basically want is the server name and the process name, the above example giving server0/server1 and 'update status' as the service. How would you go about extracting merely these two pieces of information, bearing in mind that the server name and process are variable?
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Apr 8, 2010
bash script:
Code:
$ bash --version
bash --version
GNU bash, version 3.1.17(2)-release (i486-slackware-linux-gnu)
Copyright (C) 2005 Free Software Foundation, Inc.
Code:
[serv:]$ cat test.sh
#!/bin/bash
[Code]...
The question is, how to config it works through 'function cool {}' or cool() {} with position parameter
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Apr 6, 2010
I've searched online and found many examples using getopts, but nothing that clearly explains it use, nor any examples of what I'm trying to do. I have a script named "process". It can take from 0 to 3 different options. I'd like to be able to handle these options regardless of the order that they are entered.
Syntax:
process [-v] [-d #] [-h|-?] [string]
-v = verbose mode on
-d # = how deep to do the process, expecting a number parameter
-h or -? = show command usage
string = only process lines containing the specified string
[Code]..
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Aug 11, 2009
Is there a way to process individual characters one-by-one from a text file in Bash, or is that hoping for a little too much from this lovable old clunker?
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May 29, 2011
PI'm trying to write a script to list all open ports in the MINIUNPND chain in iptables and use the procotol, port and destination ip to open ports on another router using upnpc.Here is the output of iptables -L MINIUPNPD
Code:
>iptables -L MINIUPNPD
Chain MINIUPNPD (1 references)
target prot opt source destination
ACCEPT tcp -- anywhere 192.168.3.124 tcp dpt:19955
ACCEPT tcp -- anywhere 192.168.3.124 tcp dpt:20054
ACCEPT tcp -- anywhere 192.168.3.130 udp dpt:10654
ACCEPT tcp -- anywhere 192.168.3.121 tcp dpt:29955
code....
No matter what i do i cant seem to remove the first 4 characters from the MYPROT array to leave only the digits. Also i cant seem to read the array back???
I thought it would simply be a loop reading each line and passing the fields in variables, executing upnpc commands i need then moving to the next line of the file until it reached the EOF.
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Mar 18, 2011
I'm making an bash script.
As input you can input different numbers from 1 to 3.
Depending from the input a text shows up.
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Feb 2, 2010
For eg: $NUMBEROFPASSES=6.19 to round up I use NUMBEROFPASSES=$(printf %.0f $NUMBEROFPASSES) What I need to do is round up from eg: 6.10 to be 7 and if lower than 6.10 round down to 6
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Mar 27, 2011
I'm learning shell scripting using bash and I want to generate 4 floating point number with 5 decimal places and write them to a file and a variable. I've done all this except the $RAMDOM enviroment variable does not generate a float number but a integrer.
[code]...
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May 25, 2010
I have lines in some files that look exactly as below, and the line numbers they occur in are always the same. (Lines 136-139)
W 0.00000000 0.00000000 2.00000000
W 0.50000000 0.50000000 2.50000000
W 0.00000000 0.00000000 3.00000000
[code]...
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Sep 3, 2010
I'm at the bottom of the bash learning curve, looking up, hoping someone can toss me a line. I need to update tracker on my system but this will erase the metatag database I've been building up over the course of months for the purpose of indexing a news archive. So the solution seems to be, 1) save the output of tracker-tag to a text file for all relevant files within a directory, 2) upgrade tracker (since the version in the Ubuntu repositories is very much out of date) and then 3) use a script to parse the text file and pass appropriate arguments back to tracker-tag to rebuild the database. It sounds as though it ought to be simple enough, but I need a push in the right direction, which hopefully will not be off the cliff. Before I confuse my metaphors any further, here's what the text file looks like.
[Code]....
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Oct 21, 2010
I have a directory with files like this:
Code:
And what I'd like is to have the files renamed like this:
Code:
How could I code it so that it removes the numerical part of the filename (at the beginning), even with different patterns (like the 01 - artist vs the 01-artist)?
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Apr 28, 2010
I just need to perform a simple operation of subtracting two numbers - that aren't whole numbers, i.e 200.56 - 67.24attempting to use expr i merely get "expr: non-numeric argument"
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Jan 10, 2011
The situation is the following:I download everyday several files from a website which are always password-protected with one out of 4 or 5 different passwords.I wanted to write a bash script to extract them automatically by trying with the different passwords.The files are mostly 7z.Can anbody lend me a hand?The starting point could be sth. like:
Code:
#!/bin/bash -x
FILE=$1
[code]....
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Apr 4, 2011
am writing a small search program for my class. I have decided to use indexing for my program. Ive researched online about indexing and how search engines do it. If im gonno do that I need to create inverted files to associate files to numbers ( numbers being the index of my paths ) . Now I was wondering what would be the best way to create an inverted file ? I was going to create sql tables using mysql api in C but then again there is no array data type or vectors to store few numbers in a single column in mysql and it is not advised to use Enum or SET
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Mar 29, 2010
I am trying to write a script which compares a log file with reference file. The log file has a table, the LHS of the table are constants strings and RHS of table values changes if there are any changes in configuration.code...
Here I am looking for a script which compares test.log file ( whose RHS data-types are known prior whether it is digit or string) with test.Ref which is reference file for test.log file. It will be really helpful for me if any of you give some idea about writing this script.
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Aug 18, 2010
I am having a souce file (say SOURCEFILE) as below with 5 columns and many rows.
pol name status loan address
123 aaa 21 100 RJY
234 bbb 31 200 RMY
345 ccc 21 300 SJY
456 ddd 41 400 pqr
i want to compare the file (say COMPAREFILE ) which is below :
123
345
I need the following output file (sayOUTPUTFILE) as below :
( ie for file COMPAREFILE i need column 2, column 4 ie name and loan from source file )
ie output file required is to be like below :
123 aaa 100
345 ccc 400
Till now iam using the following method.
1. cutting column 2nd column
2. again cutting 4th column
3. in third, step merging the 2nd and 4 th column.
method of writting single line command or any awk programme to do this in one step.
I need output file (say OUTPUTFILE) as below
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