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• Vim: How to install plugin for a particular filetype?

  - by ronnie

  Yesterday I came across jedi-vim plugin which provides auto-completion for python. I installed the plugin using pathogen by placing it in bundle directory and it is working fine. Now, as I have mentioned that this plugin is only for filetype: python so I want to load it only when I open files with .py extensions and not when I open other files like .java, .perl, .sh. So, how can this be achieved. I am a vim beginner/noob but I googled before asking and found that this can be achieved using vim ftplugin but I have no idea whatsoever where to place which file.

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• Bugzilla random lag and CPU usage

  - by Serty Oan

  Here is the configuration : Bugzilla (3.4.2) application running on a Ubuntu server 8.04 with Perl 5.8.8. Here is the problem : Sometimes (randomly), pages take very long to load. It can be any of the login page or query.cgi page or buglist.cgi... etc... Using top on the server, I tried to see what was wrong, and saw that sometimes a bugzilla script would use 30% memory and last pretty long (1 to 5 seconds) and sometimes not even show in the list because it responded too quickly or just use 2%. The mysqld process does not seems to be the problem.

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• linux recommendations for older pc

  - by jdamae

  Hi, I'm new to Linux and I am interested in installing the OS on an older computer I have. I want to setup a webserver and install php, perl. My pc is an older HP Pavillion a255c, Intel Pentium 4 with 512ram. I will probably add some more memory later. This pc is more like a sandbox than anything, but would like to get quickly started with the OS. Is there a particular flavor of linux I would need to download based on my older computer? Any recommendations? I was thinking about Ubuntu but not sure what version to go with. Thanks for your help.

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• Wine not finding some files

  - by Levans

  I'm having strange issues with Wine : If I look a C:\windows\system32\drivers\ in wine explorer, the directory looks empty, while the directory ~/.wine/drive_c/windows/system32/drivers is not. Plus, having the H: drive mapped to my home directory, I can look at H:\.wine\drive_c\windows\system32\drivers and it is not empty, the files are here ! Thus it seems Wine has the rights to access these files. So why don't they appear on the C: drive ? Some of my programs need them. I'm using Gentoo Linux, and Wine is version 1.7.0 compiled with these useflags (from eix) : X alsa cups fontconfig gecko jpeg lcms ldap mono mp3 ncurses nls openal opengl perl png prelink run-exes ssl threads truetype udisks xcomposite xinerama xml -capi -custom-cflags -dos -gphoto2 -gsm -gstreamer -odbc -opencl -osmesa -oss -pulseaudio -samba -scanner -selinux -test -v4l ABI_MIPS="-n32 -n64 -o32" ABI_X86="32 64 -x32" ELIBC="glibc" EDIT: I just updated to wine 1.7.4 and nothing changed.

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• How do I rewrite *.example.com to www.example.com?

  - by Lekensteyn

  In my network, I've some Ubuntu machines which need to download files from nl.archive.ubuntu.com. Since it's quite a waste of time to download everything multiple times, I've setup a squid proxy for caching the data. Another use for this proxy was rewriting requests for archive.ubuntu.com or *.archive.ubuntu.com to nl.archive.ubuntu.com because this mirror is faster than the US mirrors. This has worked quite well, but after a recent install of my caching machine, the configuration was lost. I remember having a separate perl program for handling this rewrite. How do I setup such a squid proxy which rewrites the host *.example.com to www.example.com and cache the result of the latter?

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• is there a way to automate changing filenames in <link> , <script> tags

  - by nepsdotin

  when we use Expires header for text files like js, css, contents are cached in the browser, to get new content we need to change in the html file the new names in the link and script tag. When we add changes. How can we automate it. I may have some bunch of html files in multiple folders also in subdirectories. There would be a text file filelist.txt OldName NewName oldfile1-ver-1.0.js oldfile1-ver-2.0.js oldfile2-ver-1.0.js oldfile2-ver-2.0.js oldfile3-ver-1.0.js oldfile3-ver-2.0.js oldfile4-ver-1.0.js oldfile4-ver-2.0.js The script should change all the oldfile1-ver-1.0.js into oldfile1-ver-2.0.js in the html, php files I would run this script before i start uploading. Finally the script could create a list of files and line number where it made the update. The solution can be in PERL/PHP/BATCH or anything thats nice and elegant

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• What is a preferred method for automatically configuring and setting up an Ubuntu instance?

  - by sutch

  I am tired of manually configuring instances of Ubuntu for testing web applications and for setting up workstations. I'm even more frustrated by the issues caused by inconsistent configurations. Is there a method (hopefully not too time consuming to learn and setup) that allows for automation of the setup and configuration of an Ubuntu server or workstation from an ISO. This is primarily for virtual machine instances, but it would be helpful to also create instances on hardware. I am specifically looking for a method to automate the installation of libraries (apt-get), configure services (such as Apache and MySQL), add 3rd party software (download, extract and build), and add libraries to scripting languages (for example, Ruby Gems or CPAN packages for Perl).

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• Insert escaped characters in seq command separator

  - by dhekir

  How do I insert a string containing escaped characters (\n, \t, etc) as separator for the seq command? The standard format includes a newline character: $ seq 3 1 2 3 But if I try to add something plus a newline, the backslash is escaped and a literal "\n" is used instead: $ seq -s "$\n" 3 1\n2\n3 The same happens using simple quotes, no quotes, or other escaped characters: $ seq -s "\t" 3 1\t2\t3 $ seq -s \t 3 1t2t3 This is not the standard behavior for commands such as echo, so I'm a bit confused here... Edit: Ideally, I'd like a somewhat portable solution (that works in tsch as well as bash, for instance), and without resorting to Perl or other languages.

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• MySQL dump, output each table row on a new line whilst using --extended-insert

  - by soopadoubled

  I'm having an issue, where for ease of use, I'd like to be able to format a command line MySQL dump so that each row of a given table is on a new line when using the --extended-insert option. Usually when using --extended-insert, every row of a given table is outputted on one line, and as far as I am aware there's no way to change this, other than post-processing the dump with perl or such like. The format I'm looking for is: -- -- Dumping data for table `ww_tbCountry` -- INSERT INTO `ww_tbCountry` (`iCountryId_PK`, `vCountryName`, `vShortName`, `iSortFlag`, `fTax`, `vCountryCode`, `vSageTaxCode`) VALUES (22, 'Albania', 'AL', 1, 0.00, '8', 'T9'), (33, 'Austria', 'AT', 1, 15.00, '40', 'T9'), (40, 'Belarus', 'BY', 1, 0.00, '112', 'T9'), (41, 'Belgium', 'BE', 1, 15.00, '56', 'T9'), (51, 'Bulgaria', 'BG', 1, 15.00, '100', 'T9' However, when I dump a database using Phpmyadmin, using --extended-insert, each row is dumped on a new line (as shown by the example above). I've gone through Phpmyadmin and can't find any documentation that would explain this. Is anyone able to shed any light on this? Thanks in advance, Ian

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• How to delete files quicker than rm -rf?

  - by Byakugan

  Is there any way how to delete folder/files quicker than with command rm -rf? It seems my disc is filled with bilions of files (sessions of php5) which were not deleted in cron so I need to delete them manually but it takes hours and it is still not helping reducing the amount. Thank you. My command: rm -rf /var/lib/php5/* Tried also these commands: find /var/lib/php5 -name "sess_*" -exec rm {} \; And perl -e 'chdir "/var/lib/php5/" or die; opendir D, "."; while ($n = readdir D) { unlink $n }'

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• Is there a lightweight MTA for Ubuntu 9.10 Desktop?

  - by Joe Casadonte

  I'm writing a Perl script to run as a cron job, and I want to email results & errors to a local account on the laptop. I'd like something that can talk SMTP (do any MTAs not adhere to SMTP?). I use Thunderbird 3, so I'll also need a POP/IMAP server (unless T-Bird can read straight from an mbox file; I'll have to check into that). No need for spam controls as I'll lock it down real tight, only accepting mail originating from the laptop itself. Thanks!

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• php programming

  - by HARSHA

  Hi, i am learning php,i downloded the xampp.and Apache server,Mysql are running properly in Xampp Control panel. I tried with a simple program that is hello world,i created a new folder in htdocs, and i saved my program in that new folder with .php extention. But when i run the program then is showing a error as follows ------ Object not found! The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again. If you think this is a server error, please contact the webmaster. Error 404 localhost 18-5-2010 11:51:44 Apache/2.2.14 (Win32) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l mod_autoindex_color PHP/5.3.1 mod_apreq2-20090110/2.7.1 mod_perl/2.0.4 Perl/v5.10.1

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• load balancing two web servers each on two different isp's?

  - by Scott

  I have two ISP's that provide me hosting via apache / php / mysql. I am running drupal on them. On occasion the mysql server will go away (crash), so I was hoping to find a reasonable way to have a fail over, if server A SQL is down, all traffic is sent to server B. I know traditionally this is handled in DNS where a second alternate ip is given if there is a problem - or similar. But I do not have control over the isp, other than I can run php, perl and the usual apache stuff. Also, I have static ip's on each isp, and I can create dns entries (A/CNAME/TXT). So, I was hoping there might be a way for me to have a script that checks if drupal has a problem, and if so, somehow alter dns, or ? Or, any other ideas? (other than spending lots more $ on a better isp)

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• Why grep -i is so slow? How to do it faster for ASCII?

  - by Vi.

  $ time lzop -d < tvtropes-index.lzo | egrep -B 5 '[Dd][eE][sS][cC][eE][nN][dD] ?[Ff][rR][oO][mM]' real 0m0.438s $ time lzop -d < tvtropes-index.lzo | egrep -B 5 'descend ?from' -i real 0m11.294s Both search insensitively. why -i so slow? How to make fast grep -i without entering things [iI][nN] [tT][hH][iI][sS] [wW][aA][Yy]? For example, perl -ne 'print if /descend ?from/i' works fast, but '-B 5' is not as trivial to implement as in grep (as well as other options).

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• Recommend a Rackspace Cloud Server API Language Binding?

  - by Alex R

  Rackspace publishes only a hard-to-use HTTP and JSON/XML based "API" (they call it an API but it's really a non-standard Web Service without a WSDL). There are dozens of open-source language bindings to choose from. I have tried three of them so far and they're all horrible (incomplete, buggy, and/or undocumented). Can anybody recommend a language binding which is reasonably complete, well documented, and bug-free? I can use Perl, Python, PHP, or Java. My ultimate objective is to create a script/program that will provision a server, launch a process inside it, wait for the process to finish, copy the results to the local server, and destroy the remote server. What's the best choice for that? Thanks

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• How can I get the size of an Amazon S3 bucket?

  - by Garret Heaton

  I'd like to graph the size (in bytes, and # of items) of an Amazon S3 bucket and am looking for an efficient way to get the data. The s3cmd tools provide a way to get the total file size using s3cmd du s3://bucket_name, but I'm worried about its ability to scale since it looks like it fetches data about every file and calculates its own sum. Since Amazon charges users in GB-Months it seems odd that they don't expose this value directly. Although Amazon's REST API returns the number of items in a bucket, [s3cmd] doesn't seem to expose it. I could do s3cmd ls -r s3://bucket_name | wc -l but that seems like a hack. The Ruby AWS::S3 library looked promising, but only provides the # of bucket items, not the total bucket size. Is anyone aware of any other command line tools or libraries (prefer Perl, PHP, Python, or Ruby) which provide ways of getting this data?

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• How do i allow users to execute commands via ssh without allocating a psuedo-terminal

  - by Dani El

  I need to allow users to run a limited set of commands. But not to allow them to create interactive sessions. Just like GitHub does. If you try to ssh without a command it greetings you and close the session. I can acquire this by using ForceCommand some-script But getting in some-script i then need to eval user's input. Perhaps any other NoTTY-like option in sshd_config? --- UPDATE --- i'm looking for a pure SSH / Bash solution, not Perl/Python/etc. hacks.

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• Why isn't VIM storing macros across sessions?

  - by dotancohen

  In VIM 7.3 on Ubuntu Server 12.04.1, VIM forgets macros and registers after closing. I do have set nocompatible in .vimrc and the command :set viminfo? gives this result: viminfo='100,<50,s10,h What might be preventing the macros and registers from being stored across close / open? Note that I am not interested in storing mappings for long term use in .vimrc. Rather, sometimes (such as during refactoring) I need to perform a simple operation on a few files and I find it easier to do in VIM than with Perl. I just need the macros and registers stored across open / close, which I do have working on other servers. Thanks.

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• Centos OS resource footprint vs Ubuntu package refresh

  - by webworm

  I am trying to determine which distro to sink my teeth into. I am new to the Linux world and would like to choose a distro to focus on. I have read that CentOS uses less resources than Ubuntu, which is an issue for me since I am renting a VPS and resource cost is an issue. I have also read that Ubuntu has more up-to-date packages which is a concern for me as I want to use PHP and some packages that have a fair amount of dependencies. I am not using Linux as a desktop OS, rather just as a server for Apache, PHP, PERL, and Java development. What would be the best choice for a server OS? CentOS or Ubuntu? Are the resource requirements that different? Are the packages that different between the two? Thanks.

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• Why is 'grep -i' so slow? How to do it faster for ASCII?

  - by Vi.

  Consider: $ time lzop -d < tvtropes-index.lzo | egrep -B 5 '[Dd][eE][sS][cC][eE][nN][dD] ?[Ff][rR][oO][mM]' real 0m0.438s $ time lzop -d < tvtropes-index.lzo | egrep -B 5 'descend ?from' -i real 0m11.294s Both search case insensitively. Why is the -i version so slow? How do I make grep -i fast without entering things like [iI][nN] [tT][hH][iI][sS] [wW][aA][Yy]? For example, perl -ne 'print if /descend ?from/i' works fast, but '-B 5' is not as trivial to implement as in grep (as well as other options).

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• How do I set up disk quotas over LDAP on CentOs?

  - by Noxshun

  I've been google-ing for some time and I haven't been able to find any resources or hints on the subject. I am wondering if it is possible to do so, if so how? Any nudge in right direction will be appricated. I do know that if you download and install "Linux Quota" from source, you'll get some perl scripts which are supposed to aid with the matter. But there is as far as I know absolutely no good documentation to help you along the way. I am also running a NFS server from the same machine. Note: This is for a university assignment, so I might be totally stupid for asking this question. I am trying to explore the options. If there is a better way of solving this, please do tell. Edit: Here is a link to the site of Linux Quota. They do include a LDAP schema, so it should be possible.

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• How do I allow users to execute commands via ssh without allocating a pseudo-terminal

  - by Dani El

  I need to allow users to run a limited set of commands. But not to allow them to create interactive sessions. Just like GitHub does. If you try to ssh without a command it greetings you and close the session. I can acquire this by using ForceCommand some-script But getting in some-script i then need to eval user's input. Perhaps any other NoTTY-like option in sshd_config? --- UPDATE --- i'm looking for a pure SSH / Bash solution, not Perl/Python/etc. hacks.

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• rsnapshot stats

  - by Obscur Moirage

  I'd like to retrieve the following stats from rsnapshot files synced added files modded files deleted files Is there a feature to retrieve these in rsnapshot, or is there another product that's able to do it? EDIT: As requested, I'll try to show that I'm not just asking what I want to do without any research. I wasn't able to locate any rsnapshot feature doing this. Maybe I'm searching in a wrong direction. So, I've built a not very pretty script, called each time before rsnapshot is ran. This Perl script stores each file MD5, in order to compare backup files structures between rsnapshot updates. I'm pretty sure it's worthless to show this code here. I think that keeping an eye on what change on a server, for example, is a useful feature. So, I'm asking. @pauska Most of the time, I'm trying to search for an answer myself, which is not the case here. Thanks

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• Get percentage free space on database volumes w/ SQL Server 2005?

  - by Allen

  I am currently using SQL Server 2005 and (undocumented I believe) master..xp_fixeddrives to get free space on my database volumes as part of my monitoring. However, this only gives me an absolute number of MB free. What I really need is percentage free. Is there another way in SQL Server 2005 to get this? If not, is there some other light-weight way to get it? If I can, I want to avoid installing a Java JRE, or Perl, or Python on my database server. Perhaps vbscript, or a small Windows executable on the file system? Yes, I know I can Google this, and I have. It looks like there are a few ways to accomplish it, and I'm curious how my DBA brethren have handled this.

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• rewrite map (prg:) never finishes

  - by SooDesuNe

  using Apache and a prg type rewrite map. My map looks like: #!/usr/bin/perl $| = 1; # Turn off buffering while (<STDIN>) { print "someothersite.com"; } the rewrite rule declared in httpd.conf is: RewriteMap app_map prg:/file/path/test.pl RewriteRule (\/[\w]+)(\/[^\#\s]+)?$ http://${app_map:$1}$2 [P,L] And the log files show: init rewrite engine with requested uri /a/testlink.html applying pattern '(\/[\w]+)(\/[^\#\s]+)?$' to uri '/a/testlink.html' It appears like test.pl is never giving control back to apache, when the map is successfully found I expect to see this output in the log file: map lookup OK: map=app_map key=/a -> val=someothersite.com Why is my map not returning control back to apache?

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