Just to jot it down lest I forget:
Tar’ing the local directory and streaming the tarball straight to gzip:
tar cvf - . | gzip > target.tar.gz
MySQLdump’ing directly to gzip: (more…)
Archive for the ‘bash’ Category
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On the fly compression of a tar-ball or mysqldump
2010
07.14
07.14
Create a Tar file from Directory and all Subdirectories
2010
06.28
06.28
It’s a simple one-liner that one tends to forget (that is, one that I forget as I untar more than I manually tar). So creating a tar file from directory and all subdirectories is as simple as
tar -cvf file.tar directory (more…)
Secure SSH Tunneling – at no extra cost
2010
06.19
06.19
Assuming you have a Windows machine and you interact with Linux boxen at any stage, chances are high that you have used and interacted with PuTTY at one stage or another. That beautiful, less than 2 sec, 444K download of a tool (currently at version 0.60 beta) allows you to SSH, COM-direct, RSH, Telnet etc from the desktop. Both examples below relate to MySQL port tunneling.
SSH Tunnels using the Bash command line
Running on a proper machine (or even a Windows with Cygwin or a Mac Terminal) allows you to quickly tunnel a session to a remote server: (more…)
[SOLVED] mysql-server5.1.5.141-3ubuntu12.1 hangs on upgrade
2010
06.15
06.15
There are a lot of words about the MySQL upgrade on Ubuntu 10.04 (64 bit specifically, perhaps the 32bit version too?) — it just hangs:
You get the hopeful message:
Preparing to replace mysql-server-5.1 5.1.41-3ubuntu12.1
but then nothing happens and everything just hangs. (more…)
Symlinks (symbolic links) in Samba Ubuntu for Windows
2010
06.04
06.04
To enable symlinks in Samba for filesharing across platforms inWindows, modify
/etc/smb/samba.conf
and add in the [global] section:
follow symlinks = yes
unix extensions = no
There has been some discussion about
wide symlinks = yes
However, due to the attack vector on Samba servers from Windows allowing file traversion, back in February 2010, you may want to force-set wide symlinks to no– it works without that declaration and is set to no by default.
Samba cheat sheet – Ubuntu
2010
06.02
06.02
Samba. Whopping goodness. Here are a few notes that help in the setup – from user creation, to directory settings etc
This blog post contains a few lessons learnt and thus by extension a migration plan from a Windows file server to a Samba-based one running on Ubuntu 10.04 LTS. I look at users, system vs smbpasswd user creation and linking (set that up in Webmin before you start, as well as for groups), share setups, general permissions and some very basic troubleshooting (as there weren’t many troubles, just headaches.) (more…)
Install Webmin on Ubuntu
2010
05.31
05.31
Just a quick note (as I keep forgetting, and a cut-and-paste solution is a quicker time to market) – but you knew that already. Installing Webmin is quite simple (download directly, or from the mirrors). Currently, 1.510-2 is the latest version – check on www.webmin.com for further details. As an aside, the book Webmin Kompakt – by Holger Reibold – is available for download!
So here’s a simple step-by-step: (more…)
Security Summit 2010 Wrap-Up
2010
05.14
05.14
So the Security Summit 2010 has come to an end. Featuring speakers such as Moxie Marlinspike, Joe Grand and Jeremiah Grossman (again), it’s a pity to say that there wasn’t much new that was presented. With repeated concerns about input- and output-validation, as the OWASP Top 10 for 2010 highlight and were used as a repeated example, and a call for a holistic approach to a company’s security posture, the idea of making the thought (and practice) of security part of the organisation’s culture came through over and over again. (more…)
Testing POP3 and IMAP servers from the command line in CMD or bash
2010
04.25
04.25
It’s quite simple, really: POP3 (Exchange, dovecot etc) you know, IMAP (Exchange, dovecot, courier etc) you know — so this is just a recap, right? You know how to telnet into the machine — in Vista or Windows 7, you may need to install it separately using “Add/Remove Programs”, or just use Putty in Telnet mode… otherwise, apt-get install telnet if it’s not on your machine (or yum install telnet)
POP3:
telnet SERVER 110 (more...)
If you’re itching for those GNU apps from Linux on Windows…
2010
04.09
04.09
You’re stuck on a Windows box. But you don’t want to install MinGW32? Can’t dual-boot to run Ubuntu or Debian on your Windows machine for some for that GNU happiness that sed, groff, wget, whois and all those happy apps bring with it? (more…)
Dump MS Access data from Ubuntu
2010
01.20
01.20
The mdbtools package for Ubuntu Jaunty includes a command called mdb-export. This allows you to dump the contents of tblName from database.mdb to STDOUT in CSV format like this:
mdb-export database.mdb tblName
Output redirection to capture the output in a file is also supported (not that that’s a feature of the app, as you know):
mdb-export sample.mdb tblFoo > capture.txt
Wipe all mp3s and avis from the filesystem
2009
09.08
09.08
So you want to run a script that removes all mp3 and avi files off the filesystem. One way (in bash) as below. Comment, suggestions and feedback are welcome 
Using $EUID to check for root user, and $IFS to check for line breaks as the file names has spaces in them. IFS is saved to a temp variable, reset and then re-instated afterwards. C is the counter. Got two litte for loops in bash with backtick execution.
