How do I have “ls” show file sizes in megabytes
ls -l –block-size=M will give you a long format listing (needed to actually see the file size) and round file sizes up to the nearest MiB. or ls -lh human readable file sizes, long format
Administration
Smartctl on Linux
SMART (Self-Monitoring, Analysis, and Reporting Technology) allows you to see the status or overall health of a hard drive. This information is instumental in providing warning signs of problems with a hard drive. All Linux distributions provide the smartmontools package, which contain the smartctl program used to display SMART information from attached drives. This package … Read more
Install flash plugin centOS 6
For 32 bit Install Flash
Install EPEL and additional repositories on CentOS and Red Hat
View Repos: http://wiki.centos.org/AdditionalResources/Repositories Install the EPEL repository You install the EPEL repository by downloading the appropriate RPM package for your system and installing it. The following instructions use the 64-bit packages that work with Rackspace Cloud Servers instances. CentOS and Red Hat Enterprise Linux 5.x CentOS and Red Hat Enterprise Linux 6.x CentOS and Red … Read more
Outbound Networking issues
Sometimes the resolvers in the server cannot find a server. You can update the DNS resolvers (/etc/resolv.conf) to rotate between a number of nameservers to try and resolve the issue. Add google nameservers to the mix with your Host resolvers.
Analyze a process
Run top Find what’s going on: This is a process to re-run awstats
SSLv3 Vulnerability (Poodle)
According to The Register, a serious vulnerability in SSL v3 will be disclosed tomorrow on October 15th. Some people are recommending disabling SSL v3 in various daemons until further notice. A vulnerability in the design of SSL version 3.0. This vulnerability allows the plaintext of secure connections to be calculated by a network attacker. SSL … Read more
Change Date/Time for CentOS 6
Need to set the data for Central Stabndard Time? CentOS System Date/Time PHP Date and Time Global MySQL Data and Time The Timezone can been set to MST by running the following: #Sync with timeserver #Lock the file #MySQL uses the system date and time, so it just needed to be restarted to take effect … Read more
Date/Timezone for CentOS 6.5 server
My Server time Zone was +00:00 GMT and today I found the time showing +1:00 GMT . Would you please tell how it has been changed ? Is that because of Daylight Saving issue ? The server currently is set to British Summer Time, which is UTC +1 currently, you can change the time zone … Read more
Bash Code Injection Vulnerability (Shellshock)
Products Affected: Product/Channel Fixed in package Remediation details Red Hat Enterprise Linux 7 bash-4.2.45-5.el7_0.2 Red Hat Enterprise Linux Red Hat Enterprise Linux 6 bash-4.1.2-15.el6_5.1 Red Hat Enterprise Linux bash-4.1.2-15.el6_5.1.sjis.1 Red Hat Enterprise Linux bash-4.1.2-9.el6_2.1 Red Hat Enterprise Linux 6.2 AUS bash-4.1.2-15.el6_4.1 Red Hat Enterprise Linux 6.4 EUS Red Hat Enterprise Linux 5 bash-3.2-33.el5.1 Red Hat … Read more