21. An attribute is a specification of an object that defines its property.
22. For yanking text, . . . . . . . . is used.
23. For creating a hard and symbolic link, which system calls are used?
24. Which command is used for acquiring superuser status?
25. Which command is used for repeating the search in the same direction?
26. paste command uses space as the default field delimiter.
27. Which command handles a character stream by duplicating its input?
28. . . . . . . . . command is used by the superuser for changing root's password.
29. Which option is used with ls command for knowing the inode number of the file?
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