How to get the $PATH environment variables of another user in Bash on Linux? The current user running the Bash script is root.
If the scripts is run by root, this piece of code will store the PATH from the environment of the user user1:
user1path=$(su - $user1 -c env | grep ^PATH= | cut -d'=' -f2-)
It runs env command as the $user to print out its environment and find out the $PATH.
Can I get a non-self-assigned and free Web server SSL/TLS certificates for my https websites? Asking the users to accept the self-assigned SSL certificates for my websites is not very convenient. Please check https://letsencrypt.org/ . PS: StartSSL used to provide 1 year free SSL. But StartCom CA is closed since Jan. 1st, 2018. Read more:…
Some entries in /etc/fstab may not not critical for booting Linux or even not available until Linux has booted. How to avoid the failures or unavailability of some mounting entries in /etc/fstab blocking the boot process of Linux? Please check the tutorial at Controlling Filesystem Mounting on Linux by Playing with /etc/fstab: Allow non-root users…
全文介绍如何使用MFC在一对话框中嵌入另一对话框. 代码如下： static MyInDlg inDlg; // 需嵌入的对话框 inDlg.Create( IDD_DIALOG, AfxGetApp()->m_pMainWnd); CRect rc; // 嵌入对话框在原对话框中的位置 //GetClientRect(&rc); rc.left = 150; rc.top = 0; rc.bottom = 200; rc.right = 350; inDlg.MoveWindow( rc ); // 设置位置 inDlg.ShowWindow( SW_SHOW ); // 将对话框显示出来 对嵌入对话框设置如下： Style: Child Border: none Read more: MFC程序使用系统风格界面 Send Messages to Other Windows Using Win32 API 禁止对话框关闭按钮和Alt+F4 一个非常优秀的MFC…
I made some changes in my local copy of the svn repository. I have not committed and updated the server yet. Now I want to discard my updates. How to revert my changes in my local copy of the repository? To discard current updates, run this in the root directory of the repository: svn revert…
I had a TP-Link TL-WN725N v2 USB wireless adapter. But it seems the kernels in Fedora 19 have not yet included drivers for it. How to install drivers for TL-WN725N v2 on Fedora 19? The driver is under development. You can find the source here and in the drivers/staging in the Linux kernel. If you…
How to detect whether a .jpg image is almost blank/black on Linux? Here is a bash function that I used to detect whether an image is black on Linux: function isBlank () { mean=`convert $1 -format “%[mean]” info:` echo “$mean” } It uses ImageMagic to generate formatted image characteristics (the mean). If the mean is…