UNIX COMMANDS WITH EXAMPLES AND SYNTAX PDF
Feb 20, The following are a series of Unix commands which will help you use the examples, the line alph% will indicate the prompt you see on your. This page lists some of the more commonly used UNIX commands. Navigating the File System (cd command). Function. Command. Example. Notes. To move. advanced concepts covering Unix commands, Unix shell scripting and various utilities. Prerequisites If you are willing to learn the Unix/Linux basic commands and Shell script but you do not Unix - Shell Arithmetic Operators Example.
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intended for Unix beginners who need a guide to the names and details of commands that are likely to be of use to . For example, using the command line. Compiled by Aluizio using the book UNIX IN A NUTSHELL, Arnold Robbins, O' Reilly Ed., 4th edition, , ISBN . example of gftp screen and login configuration necessary to access OMG computers . syntax: stty [options] [ modes] < device. Nov 8, More ssh examples: 5 Basic Linux SSH Client Commands ls -F. More ls examples: Unix LS Command: 15 Practical Examples .. so check the Solaris ping man page (“ man ping “) to see its syntax – very useful for troubleshooting .. them, I can't copy/paste from the resulting PDF into a notes document.
The -s option can be used to create a symbolic link between the two files. If the files are on different file systems, the -s option must be specified.
The logout command will not execute if there are any stopped jobs. To logout, you must first kill or activate the jobs. The logout command will not terminate any jobs running in the background. It is imperative that you remember to kill all background jobs before logging out.
All filenames to be printed should be separated by spaces. The -c option tells AIX to immediately copy the file instead of making a link to the file. If this option is not specified, any changes to the file specified on the command line will be written to the printout if made before the printer finishes printing the file. By default, your printout will go to the Panasonic printer located in the same lab as you.
You can change to another queue by using the -d option and specifying the proper Queue to which your file is to be sent. The -m option can be used if you wish mail to be sent to your account upon completion of the printing.
The -w option will send a message to your first terminal upon completion of the printing. You can specify the number of copies to print by issuing a -n followed by the number of copies.
By default, lp will only print one copy of the specified files. If no parameters are specified, lpq will display all the files on the default queue. The -l option can be used to display more information about the files on the queue. To view another queue, specify its name after the -P option.
You can also view a specific file by typing its jobNumber o the command line, or you can view all your queued files by specifying your userID. By default, lpr will print a banner page before printing the specified set of files. It is recommended that this command be used for printing because this banner page prevents sequential files from being printed on the same page when a formfeed is not sent at the end of a file.
This command has many options, enabling you to control how the file is printed and what actions are done when the file is done printing. You can specify the number of copies to be printed after the - option. The -c option specifies the class to use as the job classification. Using the -h option lets you suppress the printing of the burst page.
You can change the indentation from the left margin by specifying the number of spaces to indent after the -i option. AIX will send you mail upon completion of the printing process if you specify the -m option. Specifying a printer after the -P option will cause AIX to send to the specified printer instead of the default printer.
You can specify the -r option to have AIX remove the file upon completion of the printing process. By default, lpr copies the file to the printing area. If a file is large, and your account has a quota, you may not be able to print the file. Using the -s option alleviates this problem by making a symbolic link to the file instead of physically copying the file. The -t option can be used to specify a title for use by the pr command. If your printout is wider than the 80 character default, you can specify the width by using the -w option.
If you wish to format your output with the pr command, you can specify the -p option. This works almost identically to the command pr lpr. Specifying the -P option lets you select the queue from which the files will be deleted. You can delete files by one of three methods. The first method is to place a dash as a parameter.
This will remove all the jobs from the print queue. Specifying a jobNumber will remove only that specific job from the queue. The third approach is to specify a userID which will remove all jobs owned by that user.
It is used to display the contents of a directory. As you can see from the syntax, there are many combinations of options with the ls command.
Most people will find a combination they like and use it in an alias to the ls command. On the next page is a table of the various options and a brief description. If you do not specify any options, AIX will open your mailbox and display your awaiting mail messages. If the -f option is specified, AIX will display a listing of the messages in your mailbox.
To send mail, type the recipient's full E-mail address as the parameter to the mail command. For more detailed information, please see the Mail handout. If you specify the -k option, AIX will display a one-line synopsis of each manual entry which contains the specified title.
The -f option will display a one-line synopsis for the command specified by title.
If you just specify a title, AIX will use the more command to display the contents of the man pages for that entry. Below is a table showing the various section numbers, and the topics they represent. If you do not specify any parameters, mesg will report your terminal's current message receiving status. The y option can be specified to allow users to send messages, and the n option will allow only the root user to send messages.
Each subdirectory specified by the directories parameter should be separated with the space character. You can change the access mode of the directories created by specifying -m and then the access privileges to be given to that subdirectory.
The -p option can be specified to create any intermediate subdirectories necessary. In order to create a subdirectory, you must have write permission in the parent directory. If the -m option is not specified, AIX will assign the access modes set by the umask command. This command displays text one screen at a time, pausing after each screen. When pausing, the word "more" will be displayed at the bottom of the screen.
If a filename was specified, more will also display the percentage of the file that has been displayed. While more is pausing, certain commands can be entered to control the program.
Pressing the [ENTER] will cause more to display the next line of the text, and pressing the spacebar will cause the next screen of text to be displayed. You can x more lines by issuing the command x [space] where x is the number of lines to display and [space] is the spacebar. The x b command will skip back x screens of text. Pressing [D] will display 11 more lines of text. You can quit by pressing [Left Arrow] , display the current line number by pressing the equals key, display help by pressing [H] , and invoke the vi editor on the current line by pressing [V].
Shell command can be invoked by placing the command after an exclamation mark. Pressing [. The :f command will display the current file and line number. You can skip to the xth file on the command line by issuing the x:n command and x:p will move to the xth previous file on the command line.
List of Unix commands
Specifying the -i option will cause AIX to prompt you before overwriting any existing file. By default, AIX will overwrite any existing files in the specified path. To rename a file or directory, specify its name followed by the newname to be used. To move a file, specify its name and then the directory to which the file is to be moved.
Unless you are root, you will be unable to raise your priority level, however, you can lower it. If you do not specify a specific priority with the -n command, AIX will use a default value.
The command will be executed just as if typed by itself on the command line. If no parameters are specified, AIX will let you change your password. AIX will ask for your old password and then your new password twice. If your passwords were entered correctly all three times, it will be changed.
Thus, the next time you login, you will need to use the new password. The -f option invokes the chfn command, allowing you to change your user information.
tr command in Unix/Linux with examples
The -s option invokes the chsh command which lets you change your default shell. When the screen is full, pg will pause the display allowing you to enter commands. You can advance or go back x pages by specifying the number of pages after a plus or minus sign respectively. Pressing [L] will display the next line of text. Pressing d and -d will scroll the screen forward or backward half a page respectively.
The dollar sign can be used to go to the end of the text, provided the pg command is not used in a pipeline. The -f option tells AIX not to split long lines. You can start the display at the specified linenumber when you precede the option with a plus sign.
You can also start the display at the first line containing the text pattern specified between slashes. If the specified host is running, it will send back a reply.
Specifying the -c option lets you set the number of packets to send at count. The -i option lets you specify the wait time between echo requests.
You can also have ping display the path taken to reach the host with the -R option. Upon completion of the echo requests, a summary will be printed showing the minimum, average, and maximum times.
You can set the string displayed in the header with the -h option. You can also set the number of spaces to indent the text with the -o option. If no options are specified, AIX will show all processes belonging to the user's current shell.
The -e option will display all process except kernels. The -f option can be used to generate a full listing or the -l option to generate a long listing. The -U option should be followed by a list of comma separated userID's in quotation marks. This will display all processes owned by the specified usernames.
Although these are purely pedagogical examples, these variables can do a lot for you. White space means any combination of spaces and tabs.
You can tell awk to delimit on anything you like by using the -F flag. The take-home lesson is, you can do tons with awk, but you don't want to do too much. Anything that you can do crisply on one, or a few, lines is awk-able.
For more involved scripting examples, see An Introduction to Unix - More awk examples.
Basic Linux/Unix Commands with Examples
I mainly use it for two things: 1 replacing text, and 2 deleting lines. Sed is often mentioned in the same breath as regular expressions although, like the rest of the world, I'd use Perl and Python when it comes to that. Nevertheless, let's see what sed can do. Sometimes the first line of a text file is a header and you want to remove it.
We can't do much more without entering regular expression territory. So this means replace A with B.As with the lpr command, you can override the default print queue settings by using the -P option to specify the receiving queue. The quality specified by the -q option can be used to set the print quality to a value of 0 to 3 representing fast printing to enhanced quality respectively.
You can also specify a directory to which the specified files are to be linked. The -v option lets you specify the number of line per inch. The -t option will display the names of the files in the archive, and the -v option will display each filename as it is processed. System administrators can trackback the person responsible for undesirable changes in the system.
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