I have one question.
Assumed I have have a variable $userlist, it has the following contents:
brownj
smithk
smithk2
smithk3
hynesp
hynesp2
leeb
How can I write a bash script that extracts all the strings smithk, smithk2, smithk3, etc from variable $userlist, and assigns these strings to a new variable?
I have a csv file in this format:
Code:
1,characterswithnospace
2,same
4545,characters
I want to extract only the strings after the comma,
I have a file with no regular way to grep or sed for any regular expression. The wordings, fields, spacings are random. code...
I want to extract character positions 3 to 10 including spaces. code...
I have a set of numbers under some headers in a file:
FNUM,BNUM,C1N,C2N,C3N,C1S,C2S,C3S,
4535, 109, 5.5955, 5.6523, 5.8084, 311.419, 295.2540, 286.9984,
4536, 109, 5.7667, 5.7174, 5.6771, 291.782, 285.0646, 271.5945,
[code]...
I have an interpteter that supports string literals, and the way it works is that the lexer returns the entire string as a single token, with the quotes removed and escape sequences replaced with the literal characters they represent.
I already implemented single-quote strings, they don't interpret any characters specially except for the single quote. I partially implemented double-quoted strings, they already support all the same backslash escape sequences that C does. But I would also want to add variable substitution.
The way it would work is that "${expression}" would interpret the expression (which could just be a variable name) and replace itself with the result. But I have no idea how to do this.
In case it matters, I'm using a hand-written lexer and recursive-descent parser.
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
I want to search and replace strings in a file with strings in other files/i need to do it with big strings(string1 is big) and i want to use a txt file for this.But this code not working :
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For example:
Code:
Changing $files to "$files" eliminate these problems but causes that whole content of variable is treated as one string (one execution of loop).
Fedora 15 with Gnome 3 is turning out to be dream for me. I am loving it, except few of the old things are gone. I don't care about the not so important stuff but I do care about the Extract here menu option, that I used to have before. I did checked I have latest unrar installed but still I don't see in Nautilus 3.0.2 context menu Extract Here option to unrar compressed files. So, I have to use the Archive manager which I want to avoid. Other feature I am missing is status bar in desktop (bottom bar) any idea how to get that back on gnome 3.
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View 1 Replies View RelatedI have problems to compile vanilla kernel on CentOS, so I downloaded kernel rpm from Fedora 12 that is similar version to extract config file from it. However, standard method
Code:
rpm2cpio file.rpm | cpio -idmv
does not work. It says something like
Code:
cpio: warning: skiped ... lines of junk
cpio: y4: unknown file type
cpio: premature end of file
I tried find answer using Google, but nothing about extraction of this new Fedora rpms on CentOS, only on older Fedora.
how to assign a local variable value to a global variable....
View 2 Replies View Relatedmy script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.
i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't
foo=+12.40
bar=${foo#+}
I am supposed to create an environment variable with the PRINTER variable, which should resolve to the word sales. Would the command be like this?: env PRINTER - NAME=SALES (is this the command to create that variable with resolving the word sales to it?)
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View 2 Replies View Relatedhow I can search within a variable and assign the results to a new variable. I'll use the following as an example -
cars="Audi BMW Cadillac Chevy Dodge Ferrari Ford Mercedes"
list=`echo ${cars} | egrep -o '<A?+|<C+'`
with the echo command I get the following output assigned to list -
A
C
C
What I'd like to get for output is -
Audi
Cadillac
Chevy
how I could do this regardless of upper/lower case letters?
I have a file : cpq_cciss-2.6.20-34.rhel4.i686.dd which is designed to build a floppy disk; these floppy is used to hold disk driver which is not on RedHat CD-Rom. But this .dd is not complete: some files, like /drivers/pci.ids are missing.My idea is to extract all files from .dd file, put missing files and then re-create a new dd file. But, how can extract all files from initial .dd file, and then recreate a new one?
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View 1 Replies View RelatedMan I can't extract data from a zip archive with password witch contains ")" and "(" characters...See my treminal:Quote:
[swampyx@AMD-RO-HD ~]$ unzip zplW.zip
Archive: zplW.zip
[zplW.zip] zplW/ password:
[code]...
I have a .rar file called Japanese, and every time I enter the command "unrar e Japanese.rar", I get the response "Cannot open Japanese.rar No such file or directory No files to extract".
I've done everything on this site, but I can't get it to extract. What do I have to do to make this work? Do I need to set the directory or something? I've seen other people mention that as a solution for other problems, but have no idea how to do it.
I'm trying to figure this error message out. This little script is supposed to tweet my laptop's IP address, as a cron job, I'm hopeful that it would do so even if it's stolen. This is a variant of one that works, but this doesn't, and I can't see a difference in the curl line of either one.
Code:
#!/bin/bash
user="xxxxxx@xxxxxxxxx"
pass="xxxxxxxxxxx"
wget [URL]
TWEET=`sed -n 1p index.html`
curl --basic --user "$user:$pass" --data-ascii "status=$TWEET" "[URL]"
rm -f index.html
exit
This is the error message.
Code:
curl: (6) Could not resolve host: status=66.183.103.67; Cannot allocate memory
{"request":"/statuses/update.json","error":"Client must provide a 'status' parameter with a value."}
Why does curl think the status is the URL?
I have a .tar archive of music that I would like to extract specific files / folders from. I've been looking at man tar but I don't seem to be able to find any information related to my quest, although someone will likely point out that it's right there in front of my nose
Anyhow, the file is called music_archive.tar and I would like to extract the folder /music/P/Pink Floyd/The Wall/. Anyone know how to do this
I use Fedora Core version 13 on laptop. my friend usually use windows OS, and send to me more *.rar I can't extract file *.rar on FC 13.
If use know, how to install WinRar on FC 13
included shell script inside c program, and i wanted to assign the value of c variable to shell variable..Can any one please suggest me how to do it?
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View 3 Replies View RelatedI can not for the life of me determine how to get the monitor serial number / manufacture date using Extended Display Identification Data (EDID). Does anyone know? None of the following provide this info:
monitor-get-edid
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monitor-edid --MonitorsDB
monitor-get-edid | monitor-parse-edid
dmidecode -q
can i use the value of one variable to generate a name for another variable? for example i want to use the counter from a "do while" loop to name and define a variable each time the loop executes. for example
objectnames1=`ls -a`
objectnames2=`ls -a`
etc.
i don't have a script yet but each time through the loop i intend to cd to a particular directory and then define a variable containing a list of each object in that directory as values. for the rest of the script to work, each variable generated has to be unique, and i can't think of a good way to accomplish this.
if using a value from one variable to name another isn't possible, can anyone think of a more elegant solution? i know limited syntax but i'm willing to read up...
I am trying to alter the character position of residue numbers above 999 in a pdb file.The following script is an attempt to:1) Get all unique pdb residue numbers (in column 5) using awk and assign it to a variable i.2) Loop through all the values in $i and if it is greater than 999, shift that number one character to the right using sed.However, the script only manages to alter the final residue numberCould anyone please advise how I can loop through all values in $i and shift it one character to the right?
#!/bin/bash
# Script to alter position of residue number in pdb file for resid above 999
i=$(awk '{print $5}' wt-test.pdb | uniq)
[code]...