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Make changes to sysctl.conf take effect without rebooting Linux?
ByQ AI made some changes to /etc/sysctl.conf. I know it will take effect next time Linux boots. However, how to make the changes to sysctl.conf take effect without rebooting Linux? You can force Linux to reload the new configuration in /etc/sysctl.conf by: execute the following command as root: sysctl -p For more details, check the manual…
How to judge whether its STDERR is redirected to a file in a Bash script on Linux?
ByEric MaWithin a Bash script, how to judge whether its STDERR is redirected to a file in Bash on Linux? For example, ./script.sh /tmp/log 2>&1 Can script.sh detect that its STDERR is redirected? Knowing the destination file is better. To test whether a script’s STDERR (or STDOUT) is redirected to a file, check by [[ -f…
An I/O Performance Comparison Between loopback Backed and blktap Backed Xen File-backed VBD
ByEric MaI have done some I/O performance benchmark test of Xen DomU. For easier management, some of our DomU VMs are using file-backed VBDs. Previously, our VMs are using Loopback-mounted file-backed VBDs. But blktap-based support are recommended by Xen community. Before considering changing from loopback based VBD to blktap based VBD, I have done this performance…
Installing and Configuring 32-bit Firefox on 64-bit Linux (Fedora)
ByEric MaOn a x86-64 64 bit Linux system, sometimes we may want to use the 32 bit Firefox, although the support to 64 bit Firefox is getting much better. Just for needed ones, this post introduces how to install 32 bit Firefox on 64 bit Linux (Fedora as the example). Install 32-bit firefox First, install firfox.i686…
Configure sMobileNet of HKUST on Linux
ByEric MaHow to configure NetworkManager to connect to sMobileNet in HKUST is introduced in this post. The wireless network connection configuration for sMobileNet in NetworkManager The SSID is “sMobileNet” Wireless security is “WPA & WPA2 Enterprise” Authentication is “Protected EAP (PEAP)” Anonymous identity is “” (empty) CA certificate is “(None)” (there will be a warning appear,…
How to adjust the system partition (C:) size of Windows?
ByEric MaThe disk management tools of Windows can adjust it to some level. But there are more space available as far as I can tell. How to further adjust the system partition (C:) size of Windows? You may check these tools: EASEUS Partition Master (free) Includes Partition Manager, Disk & Partition Copy Wizard and Partition Recovery…