Use trickle
sudo yum install trickle
trickle -d <kB/s for download> -u <kB/s for upload> bash
Category: commands
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Centos Linux limit a shell download bandwidth
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Install telnet client on Windows
- Open a command prompt window. Click Start, type cmd in the Start Search box, and then press ENTER.
- Type the following command:
pkgmgr /iu:"TelnetClient"
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Uninstall MongoDB on Centos using yum remove
First, get the list of packages to be removed:
rpm -qa –qf=”%{n}-%{v}-%{r}.%{arch}n” ‘mongo*’ | sort
Then use yum remove
sudo yum remove <package names>
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Run multiple command in docker
To run multiple commands in docker, use /bin/bash -c and semicolon ; to separate the commands. For example: change directory and run a python script:docker run image /bin/bash -c “cd /path/to/somewhere; python a.py” -
Pull centos docker image
To pull centos as a base image to build other docker images:
docker pull centos:centosX
Where X can be 5, 6 or 7
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Run docker registry on port 5000
Command:
docker run -p 5000:5000 registry -
Docker exited with code 1
Error: docker run with Exited (1)
Cause: the CMD you run inside the docker exits with error
Solution: Check the error in docker log by these steps:
1. sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f4c94eb133b4 dockername:latest “httpd” 55 seconds ago Exited (1) 54 seconds ago0.0.0.0:80->80/tcp webserver2. sudo docker logs CONTAINER_ID
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Ruby gem check installed version
gem query –local
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Docker clean up defunct/untagged images using rm and rmi
The following 2 commands will do the job:
sudo docker ps -a | grep ‘Exited’ | awk ‘{print $1}’ | xargs –no-run-if-empty sudo docker rm
sudo docker images | grep ‘none’ | awk ‘{print $3}’ | xargs –no-run-if-empty sudo docker rmi -
Delete branch in git
Delete local branch:
git branch -D [branchname]
Delete remote branch:
git branch -rd origin/[branchname]