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$ ./test.sh & 
[1] 17208 
$ jobs -l 
[1]+ 17208 Running ./test.sh & 
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$ ./test.sh 
[1]+ Stopped ./test.sh 
$ bg %1 
[1]+ ./test.sh & 
$ jobs -l 
[1]+ 22794 Running ./test.sh & 
µ«ÊÇÈçÉÏ·½µ½ºǫִ́ÐеĽø³Ì£¬Æä¸¸½ø³Ì»¹Êǵ±Ç°ÖÕ¶ËshellµÄ½ø³Ì£¬¶øÒ»µ©¸¸½ø³ÌÍ˳ö£¬Ôò»á·¢ËÍhangupÐźŸøËùÓÐ×Ó½ø³Ì£¬×Ó½ø³ÌÊÕµ½hangupÒÔºóÒ²»áÍ˳ö¡£Èç¹ûÎÒÃÇÒªÔÚÍ˳öshellµÄʱºò¼ÌÐøÔËÐнø³Ì£¬ÔòÐèҪʹÓÃnohupºöÂÔhangupÐźţ¬»òÕßsetsid½«½«¸¸½ø³ÌÉèΪinit½ø³Ì(½ø³ÌºÅΪ1) 
$ echo $$ 
21734 
$ nohup ./test.sh & 
[1] 29016 
$ ps -ef | grep test 
515 29710 21734 0 11:47 pts/12 00:00:00 /bin/sh ./test.sh 
515 29713 21734 0 11:47 pts/12 00:00:00 grep test 
$ setsid ./test.sh & 
[1] 409 
$ ps -ef | grep test 
515 410 1 0 11:49 ? 00:00:00 /bin/sh ./test.sh 
515 413 21734 0 11:49 pts/12 00:00:00 grep test 
ÉÏÃæµÄÊÔÑéÑÝʾÁËʹÓÃnohup/setsid¼ÓÉÏ&ʹ½ø³ÌÔÚºǫ́ÔËÐУ¬Í¬Ê±²»Êܵ±Ç°shellÍ˳öµÄÓ°Ïì¡£ÄÇô¶ÔÓÚÒѾ­ÔÚºǫ́ÔËÐеĽø³Ì£¬¸ÃÔõô°ìÄØ£¿¿ÉÒÔʹÓÃdisownÃüÁ 
$ ./test.sh & 
[1] 2539 
$ jobs -l 
[1]+ 2539 Running ./test.sh & 
$ disown -h %1 
$ ps -ef | grep test 
515 410 1 0 11:49 ? 00:00:00 /bin/sh ./test.sh 
515 2542 21734 0 11:52 pts/12 00:00:00 grep test 
ÁíÍ⻹ÓÐÒ»ÖÖ·½·¨£¬¼´Ê¹½«½ø³ÌÔÚÒ»¸ösubshellÖÐÖ´ÐУ¬ÆäʵÕâºÍsetsidÒìÇúͬ¹¤¡£·½·¨ºÜ¼òµ¥£¬½«ÃüÁîÓÃÀ¨ºÅ() À¨ÆðÀ´¼´¿É£º 
$ (./test.sh &) 
$ ps -ef | grep test 
515 410 1 0 11:49 ? 00:00:00 /bin/sh ./test.sh 
515 12483 21734 0 11:59 pts/12 00:00:00 grep test 
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