How do I write the output into the file in Linux bash shell? Can you explain I/O redirection for both bash and POSIX shell to write data to the file under Unix or Linux?
[continue reading…]
I set up a new cloud server, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in CentOS 8 (CentOS Enterprise Linux 8)? How do I write simple bash completion code in CentOS 8?
[continue reading…]
I am a new to shell scripting. How do I check for NULL value in a Linux or Unix shell scripts?
[continue reading…]
I set up a new
RHEL 8 VM from cloud images, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in RHEL 8 (Red Hat Enterprise Linux 8)? How do I write simple bash completion code in RHEL 8?
[continue reading…]
I set up a new
Ubuntu Linux LXD container, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in Ubuntu Linux 18.04/20.04 LTS? How do I write simple bash completion code in Ubuntu Linux?
[continue reading…]
I often see commands as follows posted on blog or forums
cp /etc/httpd/httpd.{,.bakup}
OR
mv resume{z,}.doc
What is the purpose of {,} in Linux and Unix shell commands?
[continue reading…]
My shell script depends upon user input. How do I find out if a variable called $_JAIL path is empty under a Linux / Apple OS X / Unix like operating systems? Can you tell me command on bash shell to find out if a variable is empty?
[continue reading…]
