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24 Cards in this Set
- Front
- Back
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what does the "id" do? |
shows information regarding the current user and the groups they belong to |
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what does the command "who" do? |
See information regarding the current login session |
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What do the parameters in the "who" command "-uH" do? |
-u says to add information about idle time and the process ID. -H asks that a header be printed |
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What does the command "echo $PATH" do? |
Shows where commands are stored in the Linux system separated by colons. /sbin and /usr/sbin directories contain admin commands. |
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If you wanted to add commands to your system, where would you store them? What about to all users? |
place them in the "bin" directory in your home directory such as (/home/cn/bin for the user named cn). To make commands available to all users store them in the /usr/local/bin directory |
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What is the order in which the shell checks for the commands you type? |
1. aliases 2. Shell reserved word 3. Function 4. Built-in command 5. file system command |
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Under the order in which the shell checks for the commands you type, what are aliases? |
Names set by the "alias" command that represent a particular command and a set of options. Type "alias" to see what aliases are set. Often, aliases enable you to define a short name for a long, complicated command. |
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Under the order in which the shell checks for the commands you type, what are Shell reserved words? |
Words reserved by the shell for special use. Many of these are words that you would use in programming-type functions, such as "do", "while", "case", and "else". |
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Under the order in which the shell checks for the commands you type, what is function? |
A set of commands that are executed together within the current shell. |
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Under the order in which the shell checks for the commands you type, what are built-in commands? |
A command built into the shell. As a result, there is no representation of the command in the file system. Some of the most common commands you will use are shell built-in commands, such as "cd"( change directories), "echo" (to output text to the screen), exit (to exit from a shell), "fg" (to bring a command running in the background to the foreground). "history" (to see a list of commands that were previously run), "pwd" ( to list the present working directory), "set"( to set shell options), and "type" (to show the location of a command). |
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What command shows the location of a command? |
"type" |
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What command allows you to see a list of commands that were previously run? |
"history" |
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What command exits you from the shell? |
"exit" |
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What command lists the present working directory? |
"pwd" |
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What command outputs text to the screen? |
"echo" |
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What does the command "echo $PATH" do? |
shows the order of paths that are checked for commands separated by colons. |
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What is the command I would use to find the locations of the "ls" command if it is aliased? |
"type -a ls" |
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How do you find a command? |
"locate " |
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All keystrokes for navigating command line |
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All keystrokes for editing command line |
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All keystrokes for cutting and pasting text from within command lines |
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How to auto complete the rest of a command line? |
tab |
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How to show possible completions of a command line? |
press twice |
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where is the history of commands stored? |
.bash_history in your home directory |
