OS Freeware tools - Linux, Windows, OS X

Great sysadmin freeware tools listed in random order:

• Gnome Partition Editor (GParted): http://gparted.sourceforge.net
• Knoppix: http://www.knopper.net/knoppix
• BartPE http://www.nu2.nu/pebuilder/
• NiroSoft Tools: http://www.nirsoft.net/utils/index.html
• Sysinternals Suite: http://technet.microsoft.com/en-us/sysinternals/bb545027
• Trinity Rescue Kit: http://trinityhome.org
• Kaspersky Rescue Disk: http://support.kaspersky.com/viruses/rescuedisk
• ddRescue: http://www.gnu.org/software/ddrescue/ddrescue.html
• F-Secure Rescue CD: http://www.f-secure.com/en/web/labs_global/removal/rescue-cd
• SafeCopy: http://safecopy.sourceforge.net/
  
  

Note: Most of these tools have no official end user support. So, Use at your own risk.

Geeky Pix

SSH connection through putty gives Access Denied error

Solution for the "Access Denied" error message when connecting to a remote box through putty even though the remote machine accepts your login credentials & let's you in:

In Putty Configuration for that session:

SSH-AUTH-GSSAPI
Uncheck both GSSAPI boxes

Source: http://centos.org/modules/newbb/viewtopic.php?topic_id=34022&forum=59&post_id=146171#forumpost146171

Resolve auditd warning asking to specify arch type

This is to resolve auditd warning asking to specify an arch type for syscall events

Sample auditd warning message:

WARNING - 32/64 bit syscall mismatch in line 14, you should specify an arch

Sample audit.rules line in question:

-a entry,always -S umask

Solution: add "-F arch=64" - without the quotes-  before the -S for the line to read like this:

-a entry,always -F arch=b64 -S umask

Google Code's RE2 REGEX Lib Syntax

This page lists the regular expression syntax accepted by RE2.

It also lists syntax accepted by PCRE, PERL, and VIM.

Grayed out expressions are not supported by RE2.