51. Which command is used to change the permissions of a file?
52. We can provide original filenames without .gz extension while checking compression ratio using gzip - l?
53. If a file is read protected, we can write to the file.
54. Which of the following are history variables?
55. Which of the following control keys will be used for scrolling one page forward?
56. It is better to use & with nice command.
57. Every shell uses at least one startup script in the user's home directory, which is executed when the user logs in.
58. Which command is used for changing filename extensions?
59. What are meta-characters?
60. POSIX recommends the use of . . . . . . . . instead of archaic `command ` for command substitution.
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