Give a command to
a. Redirect standard output from a sort command to a file named
phone_list. Assume the input file is named numbers.
b. Translate all occurrences of the characters [ and { to the character (, and
all occurrences of the characters ] and } to the character ), in the file
permdemos.c.
c. Create a file named book that contains the contents of two other files:
part1 and part2.
a. $ sort numbers > phone_list
b. $ cat permdemos.c | tr '[{}]' '(())' or
$ tr '[{}]' '(())' < permdemos.c
c. $ cat part[12] > book
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