SNMP v3 and Cacti
A quick synopsis on setting up a Cisco ASA and a Centos 6 or 7 system to use SNMP v3 to be monitored by Cacti Cisco ASA en conf t # create a snmp-server group (needed for SNMP v3) # … Continue reading →
Category Archives: Centos
Limit access to web site with a combination of IP address and basic authentication
I have a web site that I need to limit access with a combination if username/password AND ip address running on Apache 2.4 I completed this by putting the following in a configuration file <VirtualHost mystuff.domain.com:80> <Directory /opt/mystuff> Options … Continue reading →
Change port for sshd server
I changed the port for sshd on my servers to reduce the number of attacks against the sshd server. In the following example, I am changing the port from the default of 22 to 43231 First – backup your sshd_config … Continue reading →
Generate a new UUID for ethernet interface
# uuidgen ifcfg-eth0 e62680c3-f5f5-4f06-b862-68e00e3b4506
Continue reading →3 command-line file conversion tools for Linux
Pandoc Everyone I know who works with markup languages says Pandoc is the go-to utility for converting between those languages. And for good reason: Pandoc not only does some pretty nifty conversions, it’s fast, too. Have a file formatted with … Continue reading →
Using UUID to Mount Disk
In linux, hard drive dev assignments can get changed between reboots – especially with external/removable drives. This means using /dev/sdX or /dev/hdX is not the best way to mount a drive that needs to be mounted every time at boot. … Continue reading →
Security Wipe Of Hard Drive Using Linux
first – determine the dev of the hard drive – as in /dev/sda /dev/sdb etc Then excute shred -vz -n 3 /dev/XXX where XXX is the identifier of the hard drive Increase 3 to a larger value for higher security … Continue reading →
semanage is not installed
semanage is used in configuring selinux. If it is not installed you need to run yum -y install policycoreutils-python
Continue reading →xrdp error: Failed at step EXEC spawning /usr/sbin/xrdp: Permission denied
Updated xrdp on a Centos 7 system and xrdp would not start. Error logged in /var/log/messages: Failed at step EXEC spawning /usr/sbin/xrdp: Permission denied Fix: chcon -t bin_t /usr/sbin/xrdp /usr/sbin/xrdp-sesman Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1177202
Continue reading →Centos 6 Installation Notes
Some Nice Pictures Of The Install Process http://linuxmoz.com/how-to-install-centos-6-linux-for-servers-desktops/ Google Earth I installed the x86_64 version of the Google Earth rpm. It did however not work: $ google-earth /usr/bin/google-earth: ./googleearth-bin: /lib/ld-lsb.so.3: bad ELF interpreter: No such file or directory Turns out … Continue reading →