I used to put a line in rc.local to email root that my server rebooted. Does anyone have a nice systemd unit file to do the same?Also useful would be a shutdown email with the output of uptime. (I usually do that manually when rebooting for a ker..
Author : Kenneth Porter
Home » Articles posted by Kenneth Porter (paged 3)
I got the email that a drive in my 4-drive RAID10 setup failed. What are my options?Drives are WD1000FYPS (Western Digital 1 TB 3.5 SATA).mdadm.conf:# mdadm.conf written out by anaconda MAILADDR root AUTO +imsm +1.x -all ARRAY /dev/md/root level=rai..
Is there some way to see the RPM changelog entries for a prospective yum update? Ideally Id like to see just the entries that are newer than the version of the package I already have.I saw a new kernel in todays yum-cron email and Id like to know w..
Im used to using git diff and svn diff to view changes in my development system. Is there a similar thing that works with changes between a repository package and the installed RPM? Ie. something that shows the changes in /etc hinted at by rpm -V…
I see my ISPs gateway sending me neighbor solicitations to my external WAN interface for LAN clients on my internal LAN interface. How do I get the box to tell the ISP gateway that my box will route those addresses?Ive been assigned a /56 and Im us..
I finally got an ISP connection with working IPv6 and now I need to add firewall rules for forwarding connections from my LAN to the WAN. Im using firewalld to handle the high-level description that gets translated to iptables/ip6tables on CentOS 7..
I just got 50 Mbps symmetric fiber from AT&T and it includes a /56 of IPv6 addresses, replacing a much slower ADSL line. I never tried to get IPv6 working on the old connection. Im using CentOS 7 as a gateway and its worked great for several versi..
This affects all VPNs and is a consequence of using loose reverse path filtering for anti-spoofing. The default CentOS setting is strict filtering but you may have changed this to loose for some unusual routing situations. Check that the value of /proc/sys/net/ipv4/conf/all/rp_fil..
When I use ls -al on a directory, for files with only owner read/write permission, the displayed attributes are -rw-, not -rw——-. That means the file names dont line up with other files in the directory, which makes the listing harder to read. W..
An age-old problem and there are some simple awk/grep-based scripts to handle the easy cases. Are there any more sophisticated tools that can extract all non-system users and groups and then merge the result into the password/group/shadow/gshadow fi..
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