My 1st Blog » Linux/Unix

Pure-Ftpd Unix Authentication

the imax — Fri, 17 Dec 2010 11:12:33 +0000

I installed pure-ftpd by RPM on my CentOS 5 test system, I was able to login as a anonymous user however I was not able to login as the standard unix user as which are defined in /etc/passwd.
I was not using the pureftpd virtual users and was running Pure-Ftpd directly from command line without the use of the configuration file.

I had run the pure-ftpd daemon by simply issuing the pure-ftpd command in shell, anyway after struggling a bit and looking here and there I found out that If you want to user simple Unix Authentication with Pure-FTPD than you will have to run it with the -l unix switch

pure-ftpd -l unix

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How to download directory using ftp

the imax — Thu, 05 Aug 2010 20:06:15 +0000

unfortunately using the bare-bone command line shell ftp which comes with linux/unix and without any scripting or some special command line utility
you wont be able to directly download a directory from a server

the problem is the sometimes you don’t have access to tar at the server and neither can you install any other shell ftp program of your liking to download files recursively

however, most of the times you would have access to wget and wget can come in very handy for downloading any directory recursively

here is the command

wget -r ftp://bobuser:bobpassword@yourhost.com/httpdocs/*

the above mentioned will download the folder httpdocs and everything under it to your server and will save you the trouble of downloading to laptop and than re-uploading to other server

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wget bad port number error

the imax — Thu, 05 Aug 2010 19:52:06 +0000

If you are trying to connect to a remote host with wget and wget is instantly throwing a “bad port number” error to your face without even trying to connect than please note that it is due to certain special characters which you have supplied to wget in the password filed

like this command gives an error

wget -r ftp://ftpuser:jyi#hh$jh#k?h@1.3.4.5
however if you remove special characters like #,$ and ? from the password than the same will work fine
so before connecting with wget you should change your password to simple one with the special characters

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cp to copy from Current to previous directory

the imax — Thu, 08 May 2008 22:36:53 +0000

It took me a couple of minutes to figure out the syntax for command to copy files from the current folder in linux to the directory or folder one level up, so here is it cp -r . ../ Related posts:How to download directory using ftp unfortunately using the bare-bone command line shell ftp which [...] Related posts:

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SecureCRT a nice piece of terminal software

the imax — Tue, 18 Mar 2008 21:16:09 +0000

I had a requirement in which I wanted to open SSH sessions with multiple hosts from Windows , execute some commands and than save the output in a log file. I was looking for some software to automate this and found SecureCRT . It has some very nice logging and automation abilities, with the ability to over write a log file or to just append to it, similarly there is also the macros feature and you just give the required commands once and than afterwards just rerun the macro by a single click.

At startup you can select multiple connections to connect and don’t have to individually login to each host , this is a real blessing If you have to connect to 20+ hosts at a time

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LPI 201 Exam

the imax — Tue, 18 Mar 2008 21:04:14 +0000

Just want to share that I took the 1st exam of the LPIC 2 series i.e. the LPI 201 paper last week and have fortunately passed it . Now just one more exam to go in the LPI series , hopefully I will also take it in 3-4 months.

This time to paper was not very difficult as after clearing the level one exams I had an idea of what to expect .

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Using Intel D102GGC with Linux

the imax — Mon, 24 Dec 2007 06:15:41 +0000

I happened to have the Intel D102GGC board since last year (with a SATA hard drive) and was unable to successfully install any Linux distribution including RHEL and SuSe 10 on it and I had practically give up the hope of using Linux under this motherboard and had turned to using Vmware for experimenting and learning Linux.

Yesterday I gave one last try by upgrading my BOIS to the latest version available at the Intel website for D102GGC board, it turned out that the version I had running that was dated back to 2005 and there were many updates available to it.

After upgrading the BIOS I one again tried to install RHEL 4 and this time everything worked out flawlessly and finally RHEL is now running fine on my system.
Please note that I also had to pass acpi=off parameter to kernel to successfully boot, other than this it was just click and forward

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How to Stop non root users from shutting down Linux

the imax — Sat, 22 Dec 2007 06:13:56 +0000

If your users have KDE to logon to the system and you want to disable the visual buttons of shutdown and restart for non root users than use the following steps

Go to start menu > control center >system administration > login manager > shutdown

and select allow shutdown local to root only, this will prevent other non root users from messing around and shutting down your system.

Users may also open a terminal and bring the system down from the shutdown command (or many

of its alias like reboot/halt)so you may also need to adjust the execute permissions on these files.

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Passed LPI Level 1 Certification

the imax — Wed, 19 Dec 2007 07:02:08 +0000

A few months (or more than just a few ) back in February I had posted about passing the LPI 101 exam, which is the 1st exam that you need to pass in order to obtain the LPI Level 1 certification. The second exam required for LPI Level 1 cert is exam 102. A few days back I also passed this exam, so I am now a proud LPI certificated professional.
I will now look for going ahead and gaining the LPIC level 2 certification , unfortunately is appears that there is not enough study books or material available to specifically prepare for the LPI 2 certification. The only Book available is O Reilly LPI Linux Certification in a Nutshell , which I have not found to be very useful . The best book was LPIC I Exam Cram 2 by Que Publishing but there isn’t any LPIC 2 book in this series.

For anyone looking to prepare for the level 1 certification I will strongly recommend the Exam Cram book from Que or if you are already a advanced user of Linux than the O Reilly LPI Linux Certification book is fine as it will quickly get you through all the objectives and important commands used in the exam without emphasizing much on the underlying concepts .

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SuSE Live DVD and VMware

the imax — Sun, 16 Sep 2007 18:04:00 +0000

Continuing my experiments with SusE and vmware , I downloaded SuSe 10.2 live DVD to play it via VMware, however it was not working and whenever I selected to boot Gnome or KDE it gave and error that “at least 512MB is required”

I turned out that the Vmware virtual machine that I create for Suse had allocated 256MB of RAM whereas 512MB is required for the Live CD, I increased the RAM size from 256 to 512 and the live version started working properly , though too slow at times.

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