51. Character class is used for matching a group of characters enclosed within a pair of . . . . . . . .
52. To find out how efficiently a program a used the system resources, which command is used?
53. The . . . . . . . . allows us to read data from the same file containing the script.
54. The command bg %2 is valid.
55. What does the following command do?
$ chmod ugo +w file01.txt
$ chmod ugo +w file01.txt56. Which of the following offset is used with lseek system call to set the offset pointer to the end of the file?
57. test statement cannot . . . . . . . .
58. Which of the following command will be used to locate those files that have not been modified for more than a year?
59. What are escape sequences?
60. What is the correct syntax for using sed?
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