centos7 | 易学教程

User input is not promted in CentOS7 using systemctl or service command

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问题 Am trying to stop the system service using systemctl or service command. The command as follows systemctl start service_name or service service_name start In that stop method am asking user to enter password which is not display on console(Suspecting ran in background). Stop method as follows stop() { read -s -p "Please provide password to stop the service" passwd } The same ran in CentOS 6 using service command, its displayed on console and entered the input. Can anyone please suggest me

using nfs network path as a kubernetes persistence volume

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问题 I have setup a kubernetes cluster with three nodes. All nodes are Linux centos machines. I need persistent volume to store data and I am trying to achive this. I was following this tutorial. But it only covers a one node cluster. https://kubernetes.io/docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/ Since, my cluster consist of three node, I could not use local path. Previous tutorial does not worked for me. I need a network path and using NFS seems a reasonable solution

Why does `git pull` fail on my webserver?

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问题 I use git to pull changes os a site's code base. The changes inside files and deletion of files works, however, when I add new files or directories (not empty ones) to the repo, it wont get pulled locally to the webserver, when pulling no error message is displayed but when checking for that file, it is not there. Online at the bitbucket repo it is shown. Tried to delete the local git repo and clone it again, this way I get all the files from origin, but the problem persist when doing a pull

centos7安装gitlab

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Gitlab 是一个用 Ruby on Rails 开发的开源项目管理程序，可以通过 WEB 界面进行访问公开的或者私人项目。它和 Github 有类似的功能，能够浏览源代码，管理缺陷和注释。下面介绍在 centos7 上安装 gitlab 的方法， gitlab 在不同的操作系统中安装的方法不一样，在同一种操作系统不同版本上安装的方法也不一样， cengos6 和 centos7 的安装方法也不一样。 1 下载包和安装 useradd abc 随便添加一个普通用户，别添加 git 用户，查看 /etc/passwd 文件，如果发现其中有 git 用户，用 userdel 命令删除，接下来用新添加的用户完成下列操作： curl -O https://downloads-packages.s3.amazonaws.com/centos-7.0.1406/gitlab-7.4.3_omnibus.5.1.0.ci-1.el7.x86_64.rpm 如果发现下载速度慢，将下载地址复制到迅雷中下载，然后将下载的包 copy 到 centos7 系统中。 sudo yum install git.x86_64 sudo yum install openssh-server sudo systemctl enable sshd sudo systemctl start sshd sudo

腾讯云主机Linux Centos7系统httpd Apache HTTP server服务安装记录

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博主看的安装教程是centos6.3的，发现安装时与centos7.1有许多不同，于是边查边安装，记录了这篇Centos7的安装教程。一、安装httpd服务 apache在centos7中是Apache HTTP server。如下对httpd的解释就是Apache HTTP Server。所以想安装apache其实是要安装httpd。首先，检测系统中是否已安装其他版本的httpd，结果没有输出则证明没有安装过；检测命令：rpm -qa | grep httpd 查询系统内置的httpd版本情况，找到 httpd.**** ：Apache HTTP Server这一句，其中的 httpd.**** 就代表你的服务器自带的httpd版本；命令：yum search httpd 运行你的httpd安装文件；命令：yum install httpd.x86_64 ----红色部分替换成你自己的httpd版本。安装成功，启动httpd服务命令（centos7）： systemctl start httpd.service 启动成功！我们现在来访问ip测试一下吧！激动人心的时刻到了！当当当当！出现这个页面即代表安装成功！（如果有朋友使用的是腾讯云主机，服务器显示安装成功，但是网页连接不上的话，请参考我的上一篇博文）少侠，先别走！最后，我们来配置一下我们的httpd文件！

Tcsh script does not exit

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问题 I am running CentOS 7, and I am having problems with tcsh scripts. I have a simple script called quittest. #!/bin/tcsh echo "Simple Test" exit 0 When I run quittest from the terminal, I get "Simple Test" And it does not exit. I can Control+C to exit. I check on the status of this with: ps aux and it shows quittest with a state of S+ (foreground interruptible sleep). If I change this script to bash, or sh, it runs fine, and exits as expected. I cannot just switch to another shell, because my

scipy.misc.imshow RuntimeError('Could not execute image view')

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问题 I am testing scipy.misc.imshow and I got RuntimeError: Could not execute image viewer . I am using Python3.4 and running it on CentOS 7. import scipy.misc img = scipy.misc.imread('Data/cat.jpg') assert len(img.shape) == 3 img_resized = scipy.misc.imresize(img, (224, 224)) img_answer = (img_resized/255.0).astype('float32') scipy.misc.imshow(img_answer) And I got an error: sh: see: command not found Traceback (most recent call last): File "/usr/local/pycharm/helpers/pydev/pydev_run_in_console

Centos7 with private network lost fixed IP

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问题 I've a network issue with a centos7 vagrant box. When I setup a private network, with fixed IP, this one is well binding first, but get lost after some seconds/minutes. vagrant up ==> default: Forcing shutdown of VM... ==> default: Destroying VM and associated drives... ==> default: Running cleanup tasks for 'shell' provisioner... Bringing machine 'default' up with 'virtualbox' provider... ==> default: Importing base box 'sfeirbenelux/centos7'... ==> default: Matching MAC address for NAT

Error while loading shared libraries: /usr/local/lib64/libssl.so.1.1

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问题 I’m trying to compile openssl-1.1.0e on Centos 7 (7.3.1611) but after i successfully compiled everything without any warning, i get an error when i’m trying any openssl command [mdm@dev openssl-1.1.0e]$ openssl version openssl: error while loading shared libraries: libssl.so.1.1: cannot open shared object file: No such file or directory Is it a bug or my mistake? Here below some info about my system/configuration Configure: [mdm@dev openssl-1.1.0e]$ ./Configure linux-x86_64 --prefix=/usr

vm-centos7-安装ceph-deploy多节点部署ceph

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用 Vmware 虚拟机新建 4 台机进行实验，主要是为了对 ceph 有直观的认识。一、准备 5 台主机 IP 地址主机名（ Hostname) 192.168.xxx.xxx admin-node ( 该主机用于管理，后续的 ceph-deploy 工具都在该主机上进行操作 ) 192.168.xxx.xxx node1 （监控节点） 192.168.xxx.xxx node2 （ osd.0 节点） 192.168.xxx.xxx node3 （ osd.1 节点）二、在虚拟机上安装 centos7 操作系统修改更新 centos7 的源中科大源 : 1. 基源 2.ceph 源三、配置你的管理主机，使之可通过 SSH 无密码访问各节点，口令留空。生成 SSH 密钥对，执行 ssh-keygen 命令把公钥拷贝到各节点： :ssh-copy-id root @ceph-server 　这里直接用 root 用户，用 root 账户能避免很多权限问题。四、安装 ceph-deploy ， centos7 系统中配置好上面的源后，执行 yum install ceph-deploy 便可安装五、 $mkdir my-cluster $cd my-cluster 六、 ceph-deploy new monitorNode1, monitorNode2 [

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