31. Which command is used to link a file with multiple filenames?
32. The output of the following command will be:
$ uniq foo1 foo2
$ uniq foo1 foo2
33. For reading input, which of the following system call is used?
34. Which symbol is used to redirect error messages to /dev/null?
35. pwd and echo $HOME will display the same output.
36. Sort command uses . . . . . . . . as default field delimiter.
37. Which shell is the most common and best to use?
38. If we are interested in knowing that whether the two files are identical or not, we can use . . . . . . . . command.
39. Which command is used for counting words, lines and characters in a file?
40. Which one of the following option is used for checking that the string is not null?
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