叶现一的专栏

Issue:While recording a video with ScreenCapLibrary in Robot Framework, you may get an exception like:Root Cause:Ubuntu was using Wayland by default, however, mss needs x11. Therefore, we need to modify the configuration. Solution:

• backup the contents of /home> tar -czvf /root/home.tgz -C /home .• test the backup> tar -tvf /root/home.tgz• unmount home> umount /dev/mapper/centos-home• remove the home logical volu

Pls refer https://themacwrangler.wordpress.com/2015/01/16/re-sizing-partitions-in-centos7/

Issue:There is a scenario that an rpm package needs to be installed, but no the dependencies packages. In that case, we want to make yum could auto find these dependencies and install the rpm packag

Issue:When you execute Yum installation or update, you may encounter following error:Loaded plugins: fastestmirror, langpacksCould not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&

Issue:When you install Virtualbox 5.1 on Ubuntu 16.04, you may encounter following error:root@XIAYE-NA1:~/Downloads# apt install virtualbox-5.1Reading package lists... DoneBuilding dependency

一、查看Linux内核版本命令（两种方法）：1、cat /proc/version[root@localhost ~]# cat /proc/versionLinux version 2.6.18-194.8.1.el5.centos.plus (mockbuild@builder17.centos.org) (gcc version 4.1.2 20080704 (Red Hat

1. Installing GNOME-Desktop:Install GNOME Desktop Environment on here.# yum -y groups install "GNOME Desktop" Input a command like below after finishing installation:# startx

1. vi /etc/lightdm/lightdm.conf and add following mod增加 greeter-show-manual-login=true  allow-guest=false  . 修改完的整个配置文件是[SeatDefaults]greeter-session=unity-greeteruser-session=ubuntugreeter-

Enlarge the disk using fdiskfdisk -l (to see the partition layout, typically we're dealing with /dev/sda2)fdisk /dev/sdad (delete a partition)2 (if the part we want to grow is /dev/sda2; note this

Issue:When you set up a Salt Master server and several Minions, you may find that

1. systemctl  enable sshd.service2. service sshd restart

Well you should have a secondary user other than root on the system to login with. Hopefully that user is in the sudoers file and has root permissions or is a part of the wheel group?If the above cr

Enable SSH on Fedora 16Posted onFebruary 13, 2012 | 7 Comments A very quick post, I needed after a fresh Fedora 16 install.Enable sshd service.$ systemctl enable sshd.servicestart

alt+f2   “xterm"    OR "konsole"  OR “gnome-terminal“

ies4linux异常：An error occured when trying to cabextract some files.如在安装ies4linux时遇到如下错误， Installing IE 6  Initializing  Creating Wine Prefix  Extracting CAB files/root/.ies4linux/downloads/ie6/CN

在RedHat Enterprise Linux 5下安装JDK       最近发现网上盛传的Linux下的JDK安装方法居然没有一个是可行的。多多少少都有些问题。所以特意费了一些功夫，以RedHat AS 5.0为例给出一个可行的安装方法。 一、系统环境操作系统:　 RedHat Enterprise Linux 5 二、安装JDK1.      从java.sun