Scripting
Read More
Kernel Panic Reboot
By default after a kernel panic Linux just sits there and waits for a user to hit the restart button. That can be a bad thing if it’s a remote server.
Category: Scripting
Linux
Read More
Mounting ISO Files
ISO images are files containing the data of a CD (almost bit per bit). They can be mounted, using the loopback device. ISO images can only be mounted read-only (use mkisofs to create images). Kernel Requirements To mount ISO images you need the following in your kernel(as module or builtin): loop-back filesystem support (under Device […]
Scripting
Read More
Monitoring /var/log/secure for break-in attempts
date >> ssh-intruders.log ; cat /var/log/secure | grep -i “sshd.*authentication failure” | sort | awk ‘{FS=”rhost=”; print $2}’ | awk ‘{FS=”user=”; print $1}’ | grep “.*\..*\.” | grep -v “knownhost.com” | grep -v “knownhost2.com” | sort | uniq | while read i; do counter=`grep -i “$i” /var/log/secure | wc -l` ; echo “$counter attempts by […]
Linux
Read More
Find all web pages that reference to www.example.com
find / -name ‘*html’ -print \ | xargs grep -l ‘www.example.com’ \ | less -Opages