How do we create command aliases in a shell?

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I want to read all input to the command from file1 direct all output to file2 and error to file 3, how can I achieve this?

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How important is shell scripting?

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What is bash eval?

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Is powershell a language?

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write a scwipt that a) takes exactly one argument, a directory name. b) if the number of argument is more or less than one,print a usage message c) if the argument is not adirectory, print another message d) for the given directory, print the five biggest files and the five files that were most recently modified. e) save the output to a file called q2output.

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What command needs to be used to take the backup?

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A file has multiple records each having three 30-bit long fields(field1,field2,field3).There is also a lookup file,LOOK_UP.dat.Now, we need to consider only the last ten digits of field1 and lookup the file LOOK_UP.dat. If there a match then field2 and field3 should replaced with corresponding data from the lookup file. otherwise that particular record,for which there is no match, should be stored in a seperate file.

2 Answers   Wipro,

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How to print pid of the current shell?

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How do I read a .sh file?

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In shell scripting if text is surrounded by single quotes what does it denotes?

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What are the additional egrep symbols?

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