am a new Linux user. How do I hide files and directories in Linux operating systems using the command line interface?
am a new Ubuntu sysadmin for the Ubuntu Linux operating system. How do I check running process in Ubuntu Linux using the command line option?
am a new to shell scripting. How do I check for NULL value in a Linux or Unix shell scripts?
ow do I display or view Linux kernel parameters for currently running/booted kernel? How can I see Linux kernel command line parameters?
am a new user of macOS Unix running on MacBook Pro and Mac mini server. I need to change the password for root user account on macOS. How do I change the root password on macOS Unix using command line options?
need to find out if my Linux server is running on 32-bit or 64-bit system. How do I know if my Linux is 32 bit or 64 bit?
installed GNU wget utility on FreeBSD as explained here
. However, whenever I use the wget command to download stuff from the Internet, it says: ERROR: cannot verify download.freebsd.org’s certificate, issued by ‘CN=Let\’s Encrypt Authority X3,O=Let\’s Encrypt,C=US’:
Unable to locally verify the issuer’s authority.
How do I fix this problem on FreeBSD 12?