Comp TIA Linux+ Bakersfield College- Ch.4
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The root user utilizes the chgrp command to give group ownership of a file to another user. What must the root user do to regain group ownership of the file?
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Run chown and list the root user as the new owner
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A file has the following permissions r----x-w-. The command chmod 143 would have the same effect as this command
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chmod u=x,g=r,o=wx file1
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umask 731
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changes permissions on all created filed to ---r--rw-
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after typing the ls-F command, you see the following line in the output: -rw-r-xr-- 1 user1 root 0 Apr 29 15:40 file1 what does this mean?
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User1 has read and write, members of the root group have read and execute, and all others have read permissions to the file
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Given the following output from the ls command, how many files are linked with file1? -rw-r--r-- 3 root root 282 Apr 29 22:06 file1
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two files are linked with file1
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the command chmod 317 file1 would produce which of the following lines in the ls command?
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--wx--xrwx1 user1 root 0 Apr 29 15:40 file1
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rwxrwxrwx
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default permissions given to directories
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rw-rw-rw-
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default permissions given to files
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which command
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searches for a file only in directories that are in the PATH variable
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execute, read, write
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3 standard Linux permissions
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/var directory
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contains spools and log files
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mv command
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moves directories and files
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what must a used do to run cp or mv interactively and be asked if she wants to overwrite an existing file?
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just type cp or mv as they run in interactive mode by default
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FHS
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created to define a standard directory structure and common file location for Linux
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when applied to a directory SGID special permission_____________________.
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causes all new files created in the directory to have the same group membership as the directory and not the entity that created them
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When you change the data in a file that is hard linked to three others,_______________.
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The data in the file you modified as well as the data in all hard linked files are modified as they share the same data and all have the same inode and file size
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chown user1:root file1
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will change the user ownership and group ownership of file1 to user1 and root respectively
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+ symbol next to a file in your home directory appended to the mode
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means additional entries exist within the ACL of the file that can be viewed using the getfacl commmand
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A symbolic link is also know as a soft link and is depicted by an @ appearing at the beginning of the filename when viewed using ls-l command.
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false
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hard links
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need to reside on the same filesystem as the target
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symbolic links
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do not need to be on the same filesystem as the target
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who can modify a file that has the immutable attribute set?
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no one can modify
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tail command
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a linux command used to diplay lines of text at the end of a file
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gedit editor
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a common text editor used within GUI environments
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linked file
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the files that represent the same data as other files
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emacs
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a popular and widespread text editor more conducive to word processing than vi. It was originally developed by Richard Stallman
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concatenation
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The joining of trext together to make one larger whole. In Linux, words and strings of text are joined togetter to form a displayed file
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strings command
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a linux command used to search for and display text characters in a binary file
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vi editor
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a powerful command-line text editor available on most unix and linux systems
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socket file
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a named pipe connecting processes on two different computers; it can also be represented by a file on the filesystem
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head command
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a linux command that displays the first set of lines of a text file
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od command
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a linux command used to display the contents of a file in octal format
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locate
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The fastest method to search for files in the Linux directory tree is to use this command
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rwx
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represented by the number 7
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symbolic links
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commonly made to directories to simplify navigating the filesystem tree
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cp command
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command used to copy a file
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/root
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in the FHS, this directory is the root users home directory
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$
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metacharacter used with the echo command to see the contents of a certain variable in memory
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sticky bit
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use the command chmod 1777 data, which allows all users to add files to the data directory. This is because you gave the write permission, however users can only delete files that they own in data
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--wx--xrwx
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the command chmod 317 file1 would produce which of the following permissions?
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chmod
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command used to change the permissions for a certain file or directory
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execute, read, write
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standard linux permissions
