Configuring Sudo
To run as root use the su or sudo commands. Avoid using root for any non-administration usage, since the root account makes it easy to create security or data risks. If you frequently use a single user desktop, you may find it convenient to configure sudo so you can use the same password for both root and your regular account. To do this, follow this procedure:
Become the root user using the su command. Enter the password for the root account when prompted.
Run this command, using your user account name in the place of “sampleusername”:
echo ’serveradmin ALL=(ALL) ALL’ >> /etc/sudoers
Note that when sudo prompts you for a password, it expects your user password, not root’s.
Tags: Configuring, sudo
/proc/[pid]/io - Display the IO accounting fields
This file contains IO statistics for each running process.
# dd if=/dev/zero of=/tmp/test.dat &
[1] 3828
–
# cat /proc/3828/io
rchar: 323934931
wchar: 323929600
syscr: 632687
syscw: 632675
read_bytes: 0
write_bytes: 323932160
cancelled_write_bytes: 0
Field Descriptions:
rchar - bytes read
wchar - byres written
syscr - number of read syscalls
syscw - number of write syscalls
read_bytes - number of bytes caused by this process to read from underlying storage
write_bytes - number of bytes caused by this process to written from underlying storage
Tags: /proc/[pid]/io, accounting, fields, I/O
cPanel & WHM Version 11.34 Released to Current Tier
cPanel Inc. announced today the release of version 11.34 of cPanel & WHM software to the CURRENT tier with many improvements and upgrade. cPanel CEO, J. Nick Koston, outlined new features that include:
- A brand new User Interface for WHM, which brings a slick new look and easier functionality, as demonstrated at the recent cPanel Conference.
- Web Disk support has been updated for Windows Vista, 7 & 8, and Mountain Lion. In addition to the Web Disk support update, we will soon be releasing Android and iOS clients.
- Email client auto configuration utilities have been updated to support the latest mail clients, as well as added support for Mountain Lion.
- Email Archiving makes its appearance in 11.34, so email users now have the option to more efficiently track, store, and access email with our vastly improved email tracking, and message retrieval, to the Mail Delivery Reports functionality we recently delivered.
- In addition, we overhauled the service monitoring system to provide better notifications, and improved the robustness of the automatic repair feature.
- New Hooks Management interface built into WHM.
- Feature Showcase page of WHM will alert you at login to any recent changes made by upgrading cPanel & WHM.
Upon updating or installing cPanel & WHM version 11.34 you will no longer be able to downgrade to a previous version.
To update cPanel & WHM manually:
Log into WHM as the root user.
Click on the WHM 11.32.X (build X) link on the top right corner of the screen.
Click the button labeled Click to Upgrade.
Reference: For details regarding version 11.34 User Guide, Release Notes, Change Log and FAQ’s, please visit http://docs.cpanel.net.
Tags: cPanel & WHM, current, Released, Tier, Version 11.34
The /proc filesystem /proc/uptime
This file contains the length of time since the system was booted, as well as the amount of time since then that the system has been idle. Both are given as floating-point values, in seconds.
Example output:
[fedora@fedora ~]$ cat /proc/uptime
3677.44 1898.50
[fedora@fedora ~]$ uptime
22:58:03 up 1:01, 2 users, load average: 0.24, 0.29, 0.32
[fedora@fedora ~]$
[root@fedora ~]#
Tags: /proc/uptime, filesystem, proc
How to Speed up NTP initial synchronization
Open the NT P configuration file /etc/ntp.conf in a text editor such as vi or nano, or create a new one if it does not already exist:
To speed the initial synchronization up, add the iburst directive at the end of each server line:
server 0.rhel.pool.ntp.org iburst
server 1.rhel.pool.ntp.org iburst
server 2.rhel.pool.ntp.org iburst
Tags: Initial, NTP, Speed, synchronization
