DEV Community: Yuvarajan Johnpaul

bash: semanage: command not found

Yuvarajan Johnpaul — Sun, 04 Apr 2021 11:25:41 +0000

While trying to install semanage and it returns the below error?
[root@yuvarajan]# yum install -y semanage
Failed to set locale, defaulting to C
No package semanage available.
Error: Nothing to do

To identify which package in the RPM provides a similar option to be available, execute the below command.
$ yum provides /usr/sbin/semanage [OR]
$ yum whatprovides semanage

It will reveal the list of supporting packages like below.
policycoreutils-python-2.2.5-11.el7.x86_64 : SELinux policy core python utilities
Repo : rhui-rhel-7-server-rhui-rpms
Matched from:
Filename : /usr/sbin/semanage

policycoreutils-python-2.2.5-11.el7_0.1.x86_64 : SELinux policy core python utilities
Repo : rhui-rhel-7-server-rhui-rpms
Matched from:
Filename : /usr/sbin/semanage

Then proceed to install any one of the package further which semanage will be available in the local client.

Processes [PIDs] get re-spawned automatically by the unidentified parent process?

Yuvarajan Johnpaul — Fri, 25 Sep 2020 07:19:01 +0000

The reason behind this problem is the services are crashing into a loop and failed to start for some reason. So, despite clearing the PIDs from the system, the daemon will keep restarting the service.

If it is an Ubuntu distribution, please use the below commands to disable the service from getting started automatically.
$ systemctl disable [service-name]
$ systemctl daemon-reload

If it is a RedHat distribution, you may disable the auto-restart by using the below command.
$ chkconfig [service-name] off

Failed to fetch error while trying to pull/install a debian image!

Yuvarajan Johnpaul — Fri, 24 Jul 2020 09:50:22 +0000

If you see failed to fetch error messages followed by an HTTP error 403 Forbidden, it could be related with the requirement to pull the data via a secure channel.

Try the below steps.

apt install apt-transport-https
apt install 'the actual package you wanted to install'

This should resolve the problem.

If the problem persists, kindly edit the corresponding remote source's protocol value from HTTP to https under /etc/apt/sources.list

No content to map to Object due to end of input.

Yuvarajan Johnpaul — Tue, 09 Jun 2020 10:10:46 +0000

You might face this issue while trying to perform REST API executions with the JSON input. This could occur if you are not passing the header along with the request [-H "Content-Type: application/json"].

However, this problem also occurs when we miss the -T argument while we are passing the JSON file along with the request.

Error from Nexus repository: Repository path must have another '/' after initial '/'

Yuvarajan Johnpaul — Fri, 15 May 2020 09:58:00 +0000

The repository path should include a slash at the end /, this error would occur if the remote URL from where we are trying to download does not include a repository name with a slash at the end.

ERROR: Existing lock /var/run/yum.pid: another copy is running as pid

Yuvarajan Johnpaul — Wed, 29 Apr 2020 15:20:34 +0000

Existing lock /var/run/yum.pid: another copy is running as pid .
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum-cron
Memory : 23 M *** (418 MB ***)
Started: Wed Apr 29 2020 - 12:41 ago
State : Sleeping, pid:

Solution:

$ yum list

[root@user bin]# yum list
Failed to set locale, defaulting to C
Existing lock /var/run/yum.pid: another copy is running as pid .
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum-cron
Memory : 23 M *** (418 MB ***)
Started: Wed Apr 29 2020 - 13:21 ago
State : Sleeping, pid:

Identify the PID from the above output.
State : Sleeping, pid:

Now, Kill if it is a stale process to resolve this issue.
$ kill -9

Warning message: package ‘abc’ is not available (for R version 3.6.3)

Yuvarajan Johnpaul — Wed, 22 Apr 2020 21:55:04 +0000

R client unable to fetch the requested package.

Have you configured RProfile with the remote mirror from where your package needs to be fetched?

If yes, Is this the command you are using?

install.packages('package_name')

If that doesn't work, you may directly fetch the mirrors through the install command like below.

install.packages('package_name',repos='http://cran.us.r-project.org')