21. The superuser can set the sticky bit.
22. A file has a permission set as 777 ie rwxrwxrwx but the directory permissions are 400. If the user tries to delete the file, will he be able to do it?
23. For extracting a substring, . . . . . . . . function is used.
24. What is execute permission?
25. The sequences of directories that a shell searches while looking for a command is specified in the PATH variable.
26. chmod and fchmod calls are used for changing file permissions.
27. readonly command is used to protect a variable from reassignment.
28. The inode number associated with a file is changed after renaming it.
29. . . . . . . . . command moves the cursor to the end of next line.
30. Which command is used to abort the editing and quit the editing mode?
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