I have been using sed to manipulate a csv file but I have one problem that I can't solve. The csv file has many line and many columns. If in a particular line column 2 has a certain value I want to replace that value with the value in column 5 in the same line.
View 5 RepliesI wonder capability of awk to manipulate data in consecutive multi files by read one batch file.for example I have files: data1.dat, data2.dat,data3.dat and listfile.txt
cat data1.dat
23 34 54
43 45 76
[code]...
My latest rpm package building project is a ham radio program called rmsgw. The source code tarball is a "make" and "make install" affair. It's Debian style Linux format fails badly on a Fedora install, so some tweaking of a configuration file is needed.I presume sed is the right tool for this job. I have no experience with sed and I don't want to spend a week or more in 'info sed' and doing endless trial and error if I can avoid it. I need to change one line in a text file named rmsgw.mk with a command(s) in the spec file.The original line:
Code:
PKG_LIBS := -lwl2k -lrms -lmysqlclient -lxml2
The line as it needs to be for 'make' to succeed to build the binaries:
[code]...
I have an application which looks in a particular directory for it's settings. For example varsetting.txt. These settings are stored in a text format and can be edited easily. I would prefer to keep this setting.txt file on a USB stick rather than the HDD for portability so that I can easily use the same settings on two linux PC's without having to redit them everytime. I have tried but cannot manipulate the application to look in a different location for this file, do you know if it is possible to "point" linux to another location when looking for the file?
View 2 Replies View RelatedHave managed to create a simple script to poll the various printers we have at our company for a page count via SNMP. At the moment the script echos the printer name to a text file and then the snmp output is appended to the next line. In my rush I thought by using sed to add a comma to the end of each line would mean it would import in to excel nicely. So rather than having:
Printer 1,
45536,
Printer 2,
[code]...
Is there any Linux tool to create new or modify exiting key/value pairs in text configuration files? For example, to change a setting in xorg.conf, or change something in etc/networking/interfaces? I know it could be done by sed or by perl scripts, but it could be easier to have a program for this purpose. There are many difficulties for this job that the program should consider, and I am facing nearly all of them:
- Some configuration files may have sections. Like in Windows-type INI files (for example: "[something]"), or like Section in xorg.conf. More sections with the same name can occur, like in xorg.conf.
- If the key/value pair originally does not exist, then the program should add it. But not to the end of the file, but tothe end of a predefined section.
- Config files can have remark lines. Remark text can be even at the same line than the key/value pair. After modifying the value, the original remark text should not change at the end of the line. The remark-starting symbol is not always.
- The values in configuration files are not always simple numbers or simple words, but in rare cases, they are composed by more words, for example: item=name address phone
And of course, we can have remark at the end, like this: item=name address phone # remark text
- The key-value separator depends on the file. Some files use "key=value" format, some other use "key value" format, or even "key1 key2 value", like xorg.conf. The as separator can also occur.
- Case sensitivity can also be an issue.
- Sometime to desired task is not to modify a value, but to add or remove a line beginning remark to a certain line.
I think that managing all these possible cases by a perl or sed program is nearly impossible. I begun to write a C program, but maybe there is already one?
What we want to do: be able to see the contents of an iso image (what files exist in the iso image) as well as being able to add data to the iso file or remove them.In order to be able to see the contents of an iso image we have to follow a process similar of that like mounting a device. In order to do so let us assume that we have the file: example.iso, under /home folder.In order to do so, we have to install the program isomaster (go to synaptic package manager and type isomaster and the program will be displayed) and then open it (via applications->sound&video). Then, browse to where the iso image exists and with the options: remove, extract, e.t.c. do the necessary steps you want. In order to save this "new" iso image with the additions you have made, you have to save it as an iso file. Go to file, save as and your new iso file is ready to be burned.
View 3 Replies View RelatedI want to encrypt a password $_POST and save it to a file. Is there anyway I can make $_POST equivalent to a php array.
View 2 Replies View Relatedi have a .pdf that i scanned in at kinko's today. unfortunately one of the pages was scanned upside down.is there a way for me to correct this in linux such that i can just open the .pdf select the page and rotate it until it is right-side up?
View 2 Replies View Relatedi'm unable to see some musicvideos on videos in germany trough copyright restrictions. i can see these videos by using a tunnelservice, but it isn't very comfortable.
in that case, i have to copy the url and paste it at the end of the tunnelservice url. a lot of stupid work.
my problem is, that i haven't enough experience to automate these actions.
i think, that i have to modify the url befor it goes to the server. there must be somewhere in the osi stack a place where i simply can modify that url with a regex but i don't know where
I own Fedora Core 12 and an HP scanner. I want to make digital copies of all the pictures I took a few years ago. I have a lot so I tried scanning five at a time thinking I could cut and paste into smaller images like with MS Paint on Windows. HPLIP 3.9.12 wouldn't let me modify the scans so I tried GIMP 2.6.10. GIMP 2.6.10 is a nightmare! When I opened my scan of five pictures I had trouble opening a new image. Then I had to specify the size of the new image. The when I cut and pasted I couldn't rotate. Then when I figured out how to rotate my image was too small.
Then I tried scanning just one picture but HPLIP left a lot of blank space. I tried cropping out the blank space with GIMP but the image size was the same with the blank space. I don't want to post photos to Flickr that are mostly empty space.I wish I could show you examples but the forum won't let me post them.Any ideas or suggestions for a program for Fedora Core 12 that's got the functions and features of MS Paint?
I setup a SSH server on my computer on a very high port, so that my brother could surf the web through my computer from Iran, since the majority of websites are filtered there.
Today, he told me he cannot connect to my computer. That's why, I got suspicious that they are doing packet based filtering instead of port. Then I decided to change the port to 433 for https, but one of my friend told me that they just banned https in Iran as well.
I was wondering if there's any way I can manipulate SSH packets between two computers so that my brother's ISP won't figure out he's exchanging SSH packets?
When playing a song, I am unable to manipulate the seek bar and skip to&fro, it's seems absolutely except for the fact the cursors (if that's the right word for it) glows, and it says "Jump to XXX" but it does nothing. This pretty much happens on any and every song, however if I play another track come back it may or may not work. Sometimes it works fine (usually not), but it'll freeze again after the track changes.
View 7 Replies View Relatedi would like to implement dhcpctl in a program to manipulate dhcp leases. It doesn't work and there are errors at compilation :
/tmp/ccYPRIt5.o: In function `LeaseCleaning(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
pxe.cpp.text+0x133a): undefined reference to `dhcpctl_initialize()'
pxe.cpp.text+0x1352): undefined reference to `dhcpctl_connect(__omapi_object**, char const*, int, __omapi_object*)'
[Code]...
Having downloaded remastersys, I tried to make a custom iso with mixed results.Whilst i got all my installed programs included, it didn't install my MacBuntu theme or cairo-dock by default. How can I manipulate remastersys to load MacBuntu and cairo-dock to launch when my custonm iso is booted?
View 2 Replies View Relatedhow can i manipulate the source code of ps command in order to hide a process from the list that run by ps.as you know ps command list all the process that exist in /proc.so how can i do this??this is part of my assingment...
View 13 Replies View Relatedi have generated .exe file from C file (ie filename.c ) after compiling in linux machine with -O option. I wish to know about how to run that .exe file when linux system starts up ?
View 3 Replies View RelatedI want to convert fdf file to xsf file or xyz file on ubuntu 9.10_32 bit .
View 5 Replies View RelatedI work for a company that makes portable devices running Linux and I was recently asked to make the underlying file system read-only for "security" purposes. Since the distribution is based on LinuxFromScratch, I know that very little writing happens at run time. So, even if the device runs on a usb flash device, I doubt that putting the root file system RO will be that beneficial. I am actually more concerned about a process actually breaking because it cannot open a file in RW mode than a process going rogue and filling the root file system with log files, etc. I'd really like to ear what kind of advantages disadvantages there really is with read-only file-systems.
View 6 Replies View RelatedCan't log into my XFCE desktop like I normaly do. all the sudden I get notified that my xsession lasted less then 10 secondsLooking at the error I can see this:
Unable to access file /home/username/.iceauthority: No such file or directory
Using failsafe I can start a terminal. From terminal I tried to start X
Code: sudo startx Result: Running on desplay:0
So I tried to run this;
Code: sudo startxfce4 And I get up a graphical desktop.
So this is not a critical situation as I easily can use this method to log on, but as there has been something causing this I would like to be able to resolve this nonetheless. Btw it is not the old chmod trick in play here, cause my .iceauthority file is gone alltogheter.
I'm currently stuck at 6.13 GMP-5.0.0 of the LFS installation. After running make, I receive the following:
error while loading shared libraries: libbfd-2.20.so: cannot open shared object file: No such file or directory
make[2]: *** [libmpn.la] Error 127
make[2]: Leaving directory `/sources/gmp-5.0.0/mpn'
[code]....
I have just been bothered by a fairly small issue for some time now. I am trying to search (using find -name) for some .jpg files recursively. This is a Redhat environment with bash.
I get this job done though I need to copy ALL of them and put them in a separate folder BUT I also need to keep the order intact after copying.
For e.g - If I get a JPG file under /home/usr/new/1/ then the destination also needs to be /test/old/new/1/.
At the moment, I am simply putting all files under /test/old/ and I can't somehow get the later /new/1/ folder path created under /test/old/
I understand this could well be done using while OR if else loop, though if someone can just guide me with a hint, I would be really grateful.
I will complete the rest of the steps and was asking here since I am still not comfortable with the shell/bash scripts yet and planning to be really good at it over the next couple of months.
I need to get the modified date on a file in linux to use in a script.I tried using 'ls -l' on the file, but this caused problems when the date turned from a single digit into a double. The reason for the problem was because I was parsing the result string on spaces.How can I get the date of the last time a file was modified so I can use it in a script? For example, if a file was modified on 1/11/2010, I need the 11.
View 2 Replies View RelatedHow can I check and set who can view or open a given folder or file?
View 1 Replies View RelatedI am using xubuntu and there are a few types of files on website that instead of downloading and saving and then opening with emacs, I would rather when the radio button choice comes up say open with emacs. I am using xubuntu with xfce, and there is no line for a command to be entered as some ubuntu editions have. In the choice of changing the opening program from mousepad to something else, it says search and allows to navigate to find a program, but I cant find emacs anywhere not in etc/ or elsewhere. So where is its executable to direct the program chooser to?
View 1 Replies View RelatedI have a Linux (Kubuntu) system with a large (~20Gb) file which I would like to mess with. Specifically, I want to copy the entire contents of another large file (~12Gb) to the middle of this file, and keep the bits of the file which are not overwritten.This is what I want to happen, with the text between the pipes representing file contents:Before:
outfile: |abcdefghijklmnopqrstuvwxyz|
infile: |123456789|
After:
[code]....
How can I read .gz file direct on shell/terminal without decompressing the file?
satimis
I had a situation in which the the path of the file to be copied is written in other file and I had to copy it using shell script..I can use cp $(cat /home/robert/location.txt) /media/sda1 on normal linux shell...But I am using buildroot script where $(cat /home/robert/location.txt) evaluate to nothing..is just blank..
View 1 Replies View RelatedI'm trying to install PCSX2 (PS2 emulator) and I get the following error: ./pcsx2: error while loading shared libraries: libgtk-x11-2.0.so.0: cannot open shared object file: No such file or directory
I've followed the instructions here http://pcsx2.net/downloads.php and believe I have all the dependencies installed. My system has the following file:
/usr/lib/libgtk-x11-2.0.so.0
I need a shell script that will add the users name and date to a file when the user has modified the file, these files are within a group and only accessible to this group. But we need a way for people in the group to know who and when the file was last modified.
View 1 Replies View Related