Tracer finds outdated running applications in your system.
Home page : Tracer Home page.
To install :
sudo dnf install tracer
Once you have done that, after every dns update/upgrade you would see a list of process’s that need to be restarted. If you want to find manually, then just :
sudo tracer
ionice is utility provided by the package util-linux. Description of util-linux:
- Description : The util-linux package contains a large variety of low-level system
- utilities that are necessary for a Linux system to function. Among
- others, Util-linux contains the fdisk configuration tool and the login
- program.
With the help of this utility, you can set the scheduler priority for your IO scheduling upto RealTime, but be careful that can make other process sluggish. Example use:
Continue readingI had issues with my mobile and reset it without taking back up of Google authenticator. Guess what, now I have no access to the worpress.com account to which my blog was linked. Tried everything and when nothing worked, had to create a new account in worespress.com…. Hopefully my subscribers will not have any issues with this change.
So, the other day, I wanted to have squid store its pid in the regular ‘var/run’ directory. Good simple enough – just add the following to “/etc/squid/squid.conf” :
pid_filename /var/run/squid/squid.pid
and create the /var/run/squid directory. Simple, hold on not so fast. Reboot and psssst.. ‘/var/run/squid’ is gone. Finally found that /var/run is handled by systemd-tmpfiles and thus you need to do this as well:
cat <>/lib/tmpfiles.d/squid.conf d /run/squid 700 squid squid EOF
So, basically you need to tell tmpfiles to create the squid directory as well.. How complicated things are becoming 🙂
Continue readingIn the recent versions of Fedora/Ubuntu, I found that if the DHCP server assigns a reserved address, the address is not applied to the system. Finally I found that adding the below in /etc/dhcp/dhclient.conf, would fix the issue.
send dh-client-identifier = hardware;
If you want a ssh key to be able to run a custom command only and nothing beyond that, then you can use the “command” option in the authorized_keys file of ssh.
For example, to limit user to run only top command with a key, you can add the key like this:
echo 'command="/usr/bin/top" ssh-rsa ' >>~/.ssh/authorized_keys
To test your speed you can use speetest-cli. Here is the description:
Command line interface for testing internet bandwidth using speedtest.net
and to install and test:
sudo yum install speedtest-cli #Run speedtest-cli
The output is like below:
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