Computer Science · all questions

UNIX
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Q281

Which symbol is used to change permissions for hidden files?

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Q282

pr command adds . . . . . . . . lines of margin at the top and bottom.

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Q283

What does the following command do?

$ kill %2

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Q284

Which of the following is not a wild-card?

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Q285

Which of the following functions is used for handling environment variables of a process?

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Q286

When touch command is used without any option but with an expression, which of the following timestamps are changed?

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Q287

We can perform word navigation in vi editor.

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Q288

Which of the following is a built-in variable for awk?

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Q289

Which option is used with the cat command for displaying file with line numbers?

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Q290

We can specify the filename with ':w' command.

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Q291

mailx command is used for sending and receiving emails.

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Q292

All the user information is stored in . . . . . . . .

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Q293

What does -i option do?

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Q294

':w' command can be used to write selected lines.

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Q295

A file can be recognized as an ordinary file or directory by . . . . . . . . symbol.

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Q296

Like chmod, chown and chgrp can also use . . . . . . . . option.

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Q297

Which of the followings command(s) is used to kill the login shell?

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Q298

Which of the following command is used to delete a single line?

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Q299

A system call is a routine built into the kernel and performs a basic function.

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Q300

The . . . . . . . . variable stores the name of the file currently being processed.

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