Useful tips for everyday
How do I extract a column and a row in R? Extract data frame cell value Extract value of a single cell: df_name[x, y] ,…
Where are environment variables defined? To create or modify environment variables on Windows: Right-click the Computer icon and choose Properties, or in Windows Control Panel,…
How to select a substring in awk command? Under Linux, the awk command has quite a few useful functions. One of them, which is called…
How do I convert a ZIP file to 7zip? How to convert ZIP to 7Z Upload zip-file(s) Select files from Computer, Google Drive, Dropbox, URL…
What does Ctrl-V do in vim? Press v to select characters, or uppercase V to select whole lines, or Ctrl-v to select rectangular blocks (use…
How do I move files from Mac to virtual machine? Windows Launch VMware Fusion. Power on the virtual machine. Click Virtual Machine > Settings. Click…
Where does the variable assignment go in Bash? export exports the variable assignment to child processes of the shell in which the export command was…
What is the default IP address of Docker? Docker uses the default 172.17. 0.0/16 subnet for container networking. How do I change the default bridge…
How do you convert e+ to excel? Display numbers in scientific (exponential) notation Select the cells that you want to format. On the Home tab,…
How do you write the date in GMT? GMT. Uses format “yyyy-MM-dd HH:mm:ss” with GMT timezone. How can I get the current date and time…