Answer Posted / sreenivas

sed reads from standard input and/or file(s), applies specified
changes which are typically mostly editing changes, and
writes to
standard output. It is relatively similar to the text editor
ed(1),
except in the case of sed it doesn't alter its input
file(s)*, but
writes the data to standard output, and sed also has some
commands
which ed does not have (and in most cases wouldn't be
suitable for or
make sense for ed). sed's commands are mostly limited to editing
type commands.

awk is sort of like an interpreted somewhat C-like language with
added built-in functionality for dealing with strings and
patterns.
Though not a fully general purpose programming language, awk
is much
closer to such than sed.

What are awk commands?

1224

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Differentiate cmp command from diff command.

1237

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What does grep v grep do?

1123

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What are the commands in UNIX to list the files in a Directory?

1253

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Describe the zip/unzip command using gzip.

1223

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What does this command do,"$more readme.txt“?

1207

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Is there any method to erase all files in the current directory, along with its all sub-directories, by using only one command?

1283

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Write a command to kill the last background job?

1150

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What is awk good for?

1190

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What are reported commands?

1192

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What does the “echo” command do?

1193

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Which command will print your home directory on screen?

1148

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Who invented grep?

1209

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What does grep v do?

1098

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what is the advaantage of each user having its own copy of the shell?

2614

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