Bash script template

Videos is one of the easiest way to develop my skills. On the web there is a lot of news collectors, but I couldn't find a comprehensive list of videos in selected areas. So why not start a list of videos worth sharing...

https://github.com/witalisoft/videosworhsharing

Really good manifest of human centric Ops:

http://www.humanops.com/

Tips from different categories:

• how to get mount point from current working directory

# while true; do findmnt . && break; cd ../;  done

• get all exit codes from pipeline

# true | false |true
# echo ${PIPESTATUS[*]}
1 0 1

• get list of packages to upgrade

# apt-show-versions -u

• get reverse package dependencies (installed)

# apt-cache rdepends --installed ...

Debugging output from hping3 using grep via pipes doesn't show any result. It's because hping3 output is buffered, to make things working as you expect use tool called stdbuf from coreutils package in ubuntu and:

# stdbuf -oL hping3 -S -p 80 blog.witalis.net | grep <lookfor>

it means ...

Initial commit for project that helps to make: docker stats command more distributed:

https://github.com/witalisoft/dds

It seems to be an easy task, make available logging from haproxy to syslog. Configuration on haproxy side was pretty easy, log file start growing, but from time to time there were some pauses. Rsyslog was the first victim, I dig into limiting configuration area, but default limits doesn't ...

After one year break I'm back. This time with new ideas more concentrating on dev side of sysadmin. The first new project called infomarquee published on github. Project brings user defined alerts in TV news station style. First iteration consist of two headlines with user defined alerts with duration ...

Not so far ago I was doing some cleanup work with static entries in /etc/hosts. I was wondering how many of these static entries are being actively used. To figure out I started digging, but without much luck. Tools like strace, ltrace doesnt give me a clear look which ...

Routine task change ip address on remote host without cut off. There are a lot of possibilites i.e. from reboot with new ip address to some fancy stuff with cron job. But there is a one method to make it clear and elegant.

Simply set:

echo 1 > /proc/sys ...