Category: Misc

Mounting cloned disk

March 19, 2019

If you try to mount a cloned disk then you may get an error about duplicate UUID values. You can override with the “nouuid” option:

mount -o nouuid /dev/xvdg1 /mnt

1	mount -o nouuid /dev/xvdg1 /mnt

If the disk is using LVM then additional steps will be required:

vgimportclone -n orignalvgname_clone   /dev/sdx [/dev/sdy....]
vgchange -ay orignalvgname_clone

1 2	vgimportclone -n orignalvgname_clone /dev/sdx [/dev/sdy....] vgchange -ay orignalvgname_clone

Now you can list the partitions with lsblk and mount the desired logical volume with the “nouuid” option.

Great Article – Why Do Websites Get Hacked

September 16, 2016

Great article from the team at Sucuri about why websites get hacked: https://blog.sucuri.net/2015/02/why-websites-get-hacked.html Covering automation, targeted vs attacks of opportunity and the motivation behind hacking, this article is a great introduction for the non technical user.

GoAccess Web Log Analyzer

April 11, 2014

Here’s a great webserver log analysis tool. It’s lightweight, fast and runs from the command line on Linux: http://goaccess.prosoftcorp.com/ Just download, build and run with something like:

goaccess -f /var/log/httpd/access_log

1	goaccess -f /var/log/httpd/access_log

I also like generating an HTML report with something like:

cat /var/log/httpd/access_log | goaccess -a > report.html

1	cat /var/log/httpd/access_log \| goaccess -a > report.html

Prepend Text To Start Of Every Line

November 12, 2013

Prepend the text “foo” to the start of every line in file. With sed:

sed -i.bak 's/^/foo/' file

1	sed -i.bak 's/^/foo/' file

With perl:

perl -e 'while (<>) {print "foo"}' < infile > outfile

1	perl -e 'while (<>) {print "foo"}' < infile > outfile

Taken from: Prepend ## to every line in a text file

Malware Scanner

December 31, 2012

Here’s a good tool for finding malware in a site: http://www.rfxn.com/projects/linux-malware-detect/ It’s easy to install as follows: Download and unpack.

wget http://www.rfxn.com/downloads/maldetect-current.tar.gz
tar -xvzf maldetect-current.tar.gz
cd maldetect-1.4.1

wget http://www.rfxn.com/downloads/maldetect-current.tar.gz

tar -xvzf maldetect-current.tar.gz

cd maldetect-1.4.1

Install


./install.sh

./install.sh

Configure email alerts. Edit /usr/local/maldetect/conf.maldet and change the following parameters:


email_alert=1
email_addr="support@reliablepenguin.com"

email_alert=1

email_addr="support@reliablepenguin.com"

Reliable Penguin provides managed web hosting, systems administration, website and server migrations, and expert consulting.

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