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PHP-fpm Too Many Open Files 24 Error (set open file descriptor limit)nixCraft
I am getting the following error in my /var/log/php7.0-fpm.log file: "ERROR: failed to prepare the stderr pipe: Too many open files (24)" How do I fix this problem?
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How to configure pfSense as multi wan (DUAL WAN) load balance failover...
How do I setup a multi-WAN load balancing and failover on pfSense router with two ADSL or cable or leased-line or FTTH (Fiber to the home) connections?
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How to see CPU temperature on CentOS 7 and RedHat Enterprise Linux 7nixCraft
I am a new sysadmin of CentOS 7 server. How do I get my CPU temperature Information on CentOS Linux 7 or Red Hat Enterprise Linux 7 server?
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How to see PCI devices info on CentOS 7 and RedHat Enterprise Linux 7nixCraft
I wanted to see PCI devices information on my CentOS/RHEL 7 box. But, I'm getting an error that read as, "-bash: lspci: command not found". How do I solve this problem and see PCI devices information...
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How to configure a static IP address on CentOS 7 / RHEL 7nixCraft
I am a new sysadmin and CentOS user. My system is configured to use DHCP. How can I switch from DHCP to static IP address configuration in a CentOS 7 desktop system? How do I setup a static TCP/IP...
View ArticleShell script to update all lxd container hypervisorA Bash Shell Scripting...
A simple shell script wrapper to update all lxd container hypervisor images eitehr running Debian or Ubuntu Linux.
View ArticleShell script to update all lxd container hypervisorA Bash Shell Scripting...
A simple shell script wrapper to update all lxd container hypervisor images eitehr running Debian or Ubuntu Linux.
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How to make make disk image with dd on Linux or UnixnixCraft
How do I create disk image using dd command? How do I perform disk cloning from a live Linux cd for backup or recovery purpose?
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Accessing Internet from cloud VM when you have only private network...
We have a couple of virtual servers hosted with Softlayer for processing data and backup purpose. The public interface is completely turned off i.e. no Internet access. We can only access VMs using a...
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How to configure Wi-fi+Lan bridged access point in pfSense firewall...
I have installed wireless mini-PCIe card for my pfSense firewall. How do I configure a bridged LAN wifi access point (AP) network and setup pfSense?
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How to configure Wi-fi+Lan bridged access point in pfSense firewall...
I have installed wireless mini-PCIe card for my pfSense firewall. How do I configure a bridged LAN wifi access point (AP) network and setup pfSense?
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Ubuntu 16.04 Create a cron.log File To Log crontab LogsnixCraft
I am a new Ubuntu Linux 16.04 user. How do I verify that my cron job is executing? I am unable to find /var/log/cron.log file. Where is the cron log file on Ubuntu 16.04 LTS server?
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cron Error: bad username; while reading /etc/cron.d file on LinuxnixCraft
I am getting the following error in my cron job log file /var/log/cron.log: Aug 22 01:59:01 server2 cron[7510]: Error: bad username; while reading /etc/cron.d/backups I have job entry as follows...
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How to configure Postfix relayhost (smarthost) to send eMail using an...
How do I configure Postfix MTA to send eMail using an external cloud-based SMTP server (with username: password) from a web server on Linux or Unix-like system? How do I configure an Ubuntu server and...
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How to install KVM on Ubuntu 16.04 LTS Headless ServernixCraft
Kernel-based Virtual Machine (KVM) is a virtualization module for the Linux kernel that turns it into a hypervisor. How can I install KVM with bridged networking, setup guest operating system as the...
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How to force users to use secure passwords on Ubuntu/Debian LinuxnixCraft
My Linux shell user can modify their password using the passwd command. How can I force users to choose the secure password that will prevent users from using stupid passwords like "abc123",...
View ArticleDisabling Google Chrome PDF viewernixCraft
Google Chrome has "Chrome PDF Viewer" to view or open pdf files. It is an unwanted feature. I do not need it at all. I want my PDF open in Preview on a MacOS X or default pdf viewer in Linux. This...
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How to apply patches on OpenBSD system/kernel and packages easilynixCraft
I am a regular Linux system user. In Linux (especially CentOS), I am used to applying updates a few times a week using yum command, but how do I do that on my OpenBSD severer? How do I apply updates on...
View ArticleShell script to reset ebtables on LinuxA Bash Shell Scripting Directory
Ebtables is an application program used to set up and maintain the tables of rules (inside the Linux kernel) that inspect Ethernet frames. It is analogous to the iptables application, but less...
View ArticleHow to create snapshot in Linux KVM VM/DomainnixCraft
Before upgrading my virtual machine, I would like to make a snapshot. I want to revert a domain/VM to a snapshot if something goes wrong with my upgrade. Is there a command to create a snapshot of...
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