bit by bit
This was originally taken from https://cohost.org/jamesmunns/post/167078-systems-engineering Systems Engineering, or “why james gets paid” Writing intros are hard, so lets cut to the executive summary. I work as a consultant. I usually work on projects that involve hardware (electronics and mechanical parts), but I usually help on the software side, from microcontroller code, up to desktop…
Synopsis I’ve been working through some cost optimization in our cloud environment and am currently focused on Object Storage, tiers and lifecycle management and wanted to post my collective thoughts and observations around it. You can find more in depth analysis in the sources listed at the bottom of the post. Storage Tiers The 4…
Condensed version of this post by Brendan Gregg @ Netflix uptime – load averages dmesg -T | tail – kernel errors vmstat 1 – overall stats by time mpstat -P ALL 1 – cpu balance pidstat 1 – process usage iostat -xz 1 – disk i/o free -m – memory usage sar -n DEV 1…
In a directory find . -name “*ABC*” -exec grep -H ‘XYZ’ {} + This essentially uses find to find the file, then -exec grep will search IN all the matching files for the string you specified.
This entire post was written by Mark Driver, formerly of blindwino.com and all copyrights I assume belong to him. The site and article has been offline for a while but I found it so insightful I saved it. It appears that Mark currently keeps a blog or site @ https://blindwino.wordpress.com/ He can be found on…
10 1 * * * /usr/bin/find /usr/local/stuff -maxdepth 1 -mtime +30 -type d | /usr/bin/xargs -r rm -r
Or counting files in any folder(s) for i in `ls -al /var/spool/postfix |grep ‘^d’|awk ‘{print $9}’|grep -v ‘\.$’`; do c=`find $i|wc -l`; echo “$c $i”; done;
Gary: here’s a great trick for calling in sick. jami – pretend that you’re not listening. nobody copy and paste to HR. Call your boss while lying on your back with your neck hanging over the bed. Peter: Good advice. I always just tried to sound congested, but that sounds more grounded in science. Gary:…
So I’ve been dorking around with 389-ds a LOT at work lately and it’s a bitch to setup, especially when it comes to the certs. As a hackathon project I decided to setup FreeIPA, which is the Free version of Redhat Identity Manager as a more comprehensive and easy to manage solution. I have this…
Check installed kernels: # rpm -q kernel kernel-2.6.32-279.el6.x86_64 kernel-2.6.32-279.2.1.el6.x86_64 kernel-2.6.32-279.5.2.el6.x86_64 kernel-2.6.32-279.9.1.el6.x86_64 Remove old kernels: # package-cleanup –oldkernels –count=2 Make it permanent: #vi etc/yum.conf installonly_limit=2