JordansphereLinux
Disable Firewalld in CentOS 7
Simple instructions on how to stop, disable and the check the status of firewall 1) Stop the firewalld service # systemctl stop firewalld 2) Disable the firewalld service from starting # systemctl disable firewalld 3) Check the status of the firewalld service # systemctl status firewalld
Useful Exim Commands
Here are some useful CLI commands when dealing with mail queues on EXIM: List amount of messages in the queue /usr/sbin/exim -bpc List all messages in the queue /usr/sbin/exim -bp Get a summary of the current mail queue /usr/sbin/exim -bp | exiqsumm Here is an example output Count Volume Oldest Newest Domain […]
Install Unbound on FreeBSD 10
Below are instructions on how to install Unbound on FreeBSD Firstly install Unbound from the ports tree: # cd /usr/ports # make search name=unbound Port: unbound-1.5.7 Path: /usr/ports/dns/unbound Info: Validating, recursive, and caching DNS resolver Maint: jaap@NLnetLabs.nl B-deps: autoconf-2.69 autoconf-wrapper-20131203 automake-1.15_1 automake-wrapper-20131203 expat-2.1.0_3 indexinfo-0.2.4 ldns-1.6.17_5 libtool-2.4.6 m4-1.4.17_1,1 perl5-5.20.3_8 R-deps: expat-2.1.0_3 ldns-1.6.17_5 […]
Enable Quotas on CentOS 6
In this example I will be checking all user quotas on an LVM which is mounted as /data 1) The first step will be to check the fstab. As we see there are no mount options for quotas # cat /etc/fstab # /dev/mapper/centos-root / ext4 defaults 1 1 UUID=2fd24677-cf50-420b-a3dd-cea7c29aa185 /boot ext4 defaults 1 2 /dev/mapper/centos-swap […]
Cannot Create Regular File : No Space Left on Device
I started having an issue with FTP and users were unable to create new files in their FTP areas. The following error displayed in my Filezilla client when I tested: 553 Could not create file I examined vsftpd and all permissions on the server but they looked fine. I then tried to copy a file from one […]
A fatal error has been detected by the Java Runtime Environment – Problematic Frame libc.so
I use Ahsay to do a file level backup on a Linux (Centos 6.6) machine. The scheduled backups suddenly started being missed. The following error appeared when I ran the backup manually. # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000003337e7f5bf, pid=2150, tid=140190110197504 # […]
Rsync to QNAP
I wanted to sync some files from OSX (10.9.4) to my QNAP (TS-210 (Firmwre 4.1.2) NAS 1. Enable Rsync by going to Download Station -> Backup Server -> Rsync server -> tick the Allow remote Rsync server to back up data to NAS and fill out a username and password. 2. Create a shared folder […]