jobs: Lists Jobs in .NET Attach Code 128C in .NET jobs: Lists Jobs

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jobs: Lists Jobs using vs .net toembed code128b on web,windows application iOS The jobs builtin li code128b for .NET sts all background jobs. The following sequence demonstrates what happens when you give a jobs command.

Here the sleep command runs in the background and creates a background job that jobs reports on:. $ sleep 60 & [1] 7809 $ jobs [1] + Running sleep 60 &. fg: Brings a Job to the Foreground The shell assigns j VS .NET ANSI/AIM Code 128 ob numbers to commands you run in the background (page 292). Several jobs are started in the background in the next example.

For each job the shell lists the job number and PID number immediately, just before it issues a prompt.. $ gnome-calculator & [1] 1246 $ date & [2] 1247 $ Thu Dec 4 11:44:40 PST 2008 [2]+ Done date $ find /usr -name ace -print > findout & [2] 1269 $ jobs [1]- Running gnome-calculator & [2]+ Running find /usr -name ace -print > findout &. Job numbers, which .net framework code 128a are discarded when a job is finished, can be reused. When you start or put a job in the background, the shell assigns a job number that is one more than the highest job number in use.

. Shell Basics 295 In the preceding ex code 128a for .NET ample, the jobs command lists the first job, gnome-calculator, as job 1. The date command does not appear in the jobs list because it finished before jobs was run.

Because the date command was completed before find was run, the find command became job 2. To move a background job into the foreground, use the fg builtin followed by the job number. Alternatively, you can give a percent sign (%) followed by the job number as a command.

Either of the following commands moves job 2 into the foreground:. $ fg 2 $ %2. You can also refer to a job by following the percent sign with a string that uniquely identifies the beginning of the command line used to start the job. Instead of the preceding command, you could have used either fg %find or fg %f because both uniquely identify job 2. If you follow the percent sign with a question mark and a string, the string can match any part of the command line.

In the preceding example, fg % ace also brings job 2 into the foreground. Often the job you wish to bring into the foreground is the only job running in the background or is the job that jobs lists with a plus (+). In these cases you can use fg without an argument.

. bg: Sends a Job to the Background To move the foregro und job to the background, you must first suspend (temporarily stop) the job by pressing the suspend key (usually CONTROL-Z). Pressing the suspend key immediately suspends the job in the foreground. You can then use the bg builtin to resume execution of the job in the background.

. $ bg If a background job attempts to read from the terminal, the shell stops it and notifies you that the job has been stopped and is waiting for input. You must then move the job into the foreground so that it can read from the terminal. The shell displays the command line when it moves the job into the foreground.

. $ (sleep 5; cat > USS Code 128 for .NET ; mytext) & [1] 1343 $ date Thu Dec 4 11:58:20 PST 2008 [1]+ Stopped $ fg ( sleep 5; cat >mytext ) Remember to let the cat out!. CONTROL-D ( sleep 5; cat >mytext ). In the preceding ex ample, the shell displays the job number and PID number of the background job as soon as it starts, followed by a prompt. Demonstrating that you can give a command at this point, the user gives the command date and its output. 296 9 The Bourne Again Shell appears on the scre en. The shell waits until just before it issues a prompt (after date has finished) to notify you that job 1 is stopped. When you give an fg command, the shell puts the job in the foreground and you can enter the input that the command is waiting for.

In this case the input needs to be terminated with a CONTROL-D to signify EOF (end of file). The shell then displays another prompt. The shell keeps you informed about changes in the status of a job, notifying you when a background job starts, completes, or is stopped, perhaps waiting for input from the terminal.

The shell also lets you know when a foreground job is suspended. Because notices about a job being run in the background can disrupt your work, the shell delays displaying these notices until just before it displays a prompt. You can set notify (page 341) to make the shell display these notices without delay.

If you try to exit from a shell while jobs are stopped, the shell issues a warning and does not allow you to exit. If you then use jobs to review the list of jobs or you immediately try to leave the shell again, the shell allows you to leave and terminates the stopped jobs. Jobs that are running (not stopped) in the background continue to run.

In the following example, find (job 1) continues to run after the second exit terminates the shell, but cat (job 2) is terminated:. $ find / -size +100 visual .net code 128 barcode k > $HOME/bigfiles 2>&1 & [1] 1426 $ cat > mytest & [2] 1428 [2]+ Stopped cat >mytest $ exit exit There are stopped jobs. $ exit exit login:.

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