Can you explain a little bit about command substitution?
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Who command in unix operating system?
what is the cmd to remove the comment lines from a file and to display the original text without comments? thanks in advance......
Write a command that will output the sorted contents of a file named in.txt and place the output in another file named out.txt, while at the same time excluding duplicate entries.
What is the unix command to confirm a remote host is alive or not?
Can you explain a little bit about command substitution?
can we use cat command as an editor ..???
Give a regular expression that finds two things, try to come up with regular expressions that find each individually using "egrep" command?
The rm command removes links to file. What does this mean? How then is a file deleted from the file system?
What are reported commands?
what is the use of wild cards?
What does this command do,"$more readme.txt“?
What will the following command do?