awk ÍêÈ«½âÎö
awk´¦ÀíµÄ¹¤×÷ÓëÊý¾Ý¿âµÄ´¦Àí·½Ê½ÓÐÏà֮ͬ´¦£¬ÆäÏàͬ´¦Ö®Ò»¾ÍÊÇawkÖ§³Ö¶Ô¼Ç¼ºÍ×ֶεĴ¦Àí¡£
ÓòºÍ¼Ç¼
awkÖ´ÐÐʱ£¬Æää¯ÀÀÓòÓÃ$1¡¢$2¡¢…¡¢$n±êʶ£¬¶à¸öÓòÖ®¼äÓöººÅ·Ö¸ô£¬Èç$1,$3¡£
$0±êʶÕû¸ö¼Ç¼(ÕûÐÐ)¡£
1 ÏÔʾÎı¾ÎļþmyfileÖÐµÚÆßÐе½µÚÊ®ÎåÐÐÖÐÒÔ×Ö·û%·Ö¸ôµÄµÚÒ»×ֶΣ¬µÚÈý×Ö¶ÎºÍµÚÆß×ֶΣº
¡¡¡¡awk -F % 'NR==7,NR==15 {printf 1 3 7}'
Grep ÃüÁîÍêÈ«½âÎö£º
\ £ººöÂÔÕýÔò±í´ïʽÖÐÌØÊâ×Ö·ûµÄÔÓк¬Òå¡£
^£ºÆ¥ÅäÕýÔò±í´ïʽµÄ¿ªÊ¼ÐС£
$: Æ¥ÅäÕýÔò±í´ïʽµÄ½áÊøÐС£
<£º´ÓÆ¥ÅäÕýÔò±í´ïʽµÄÐпªÊ¼¡£
>£ºµ½Æ¥ÅäÕýÔò±í´ïʽµÄÐнáÊø¡£
[ ]£ºµ¥¸ö×Ö·û£¬Èç[A]¼´A·ûºÏÒªÇó ¡£
[ - ]£º·¶Î§£¬Èç[A-Z]£¬¼´A¡¢B¡¢CÒ»Ö±µ½Z¶¼·ûºÏÒªÇó ¡£
¡££ºËùÓеĵ¥¸ö×Ö·û¡£
* £ºÓÐ×Ö·û£¬³¤¶È¿ÉÒÔΪ0¡£
-n ÔÚÏÔʾ·ûºÏ·¶±¾ÑùʽµÄÄÇÒ»ÁÐ֮ǰ£¬±êʾ³ö¸ÃÁеÄÁÐÊý±àºÅ¡£
-i ºöÂÔ×Ö·û´óСдµÄ²î±ð¡£
-L ÁгöÎļþÄÚÈÝ·ûºÏÖ¸¶¨µÄ·¶±¾ÑùʽµÄÎļþÃû³Æ¡£
-rµ±Ö¸¶¨Òª²éÕÒµÄÊÇĿ¼¶ø·ÇÎļþʱ£¬±ØÐëʹÓÃÕâÏî²ÎÊý£¬·ñÔògrepÖ¸Á»Ø±¨ÐÅÏ¢²¢Í£Ö¹¶¯×÷
Àý£º
1 grep -2 pattern filename Í¬Ê ......
ÈçºÎÔÚlinux/unixÖÐÉèÖÃÏ̵߳ÄÓÅÏȼ¶
int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg);
À´´´½¨Ị̈߳¬µ«ÊÇÈçºÎÉèÖÃÏ̵߳ÄÓÅÏȼ¶ÄØ£¿
ÔÚÌÖÂÛÕâ¸öÎÊÌâµÄʱºò£¬ÎÒÃÇÏÈҪȷ¶¨µ±Ç°Ïß³ÌʹÓõĵ÷¶È²ßÂÔ£¬posixÌṩÁË
int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy);º¯ÊýÀ´»ñÈ¡Ëù
ʹÓõĵ÷¶È²ßÂÔ£¬ËüÃÇÊÇ£ºSCHED_FIFO, SCHED_RR ºÍ SCHED_OTHER¡£
ÎÒÃÇ¿ÉÒÔʹÓÃ
int sched_get_priority_max(int policy);
int sched_get_priority_min(int policy);
À´»ñÈ¡Ïß³ÌÏ߳̿ÉÊÇÉèÖõÄ×î´óºÍ×îСµÄÓÅÏȼ¶Öµ£¬Èç¹ûµ÷Óóɹ¦¾Í·µ»Ø×î´óºÍ×îСµÄÓÅÏȼ¶Öµ£¬·ñÔò·µ»Ø£1¡£
´ÓÎÒÏÖÔÚÔËÐеÄlinuxϵͳÖУ¬ÎÒʹÓÃÏÂÁгÌÐò£¨³ÌÐò¼û¸½Â¼£©»ñÈ¡Á˶ÔÓ¦ÈýÖÖµ÷¶È²ßÂÔÖеÄ×î´óºÍ×îСÓÅÏȼ¶£º
policy = SCHED_OTHER
Show current configuration of priority
max_priority = 0
min_priority = 0
Show SCHED_FIFO of priority
max_priority = 99
min_priority = 1
Show SCHED_RR of priority
max_priority = 99
min_priority = 1
Show priority of current thread
priority = 0
Set thread policy
......
Linux ÄÚºËÆô¶¯·ÖÎö
1. ÄÚºËÆô¶¯µØÖ·
1.1. Ãû´Ê½âÊÍ
ZTEXTADDR
½âѹ´úÂëÔËÐеĿªÊ¼µØÖ·¡£Ã»ÓÐÎïÀíµØÖ·ºÍÐéÄâµØÖ·Ö®·Ö£¬ÒòΪ´ËʱMMU´¦ÓڹرÕ״̬¡£Õâ¸öµØÖ·²»Ò»¶¨Ê±RAMµÄµØÖ·£¬¿ÉÒÔÊÇÖ§³Ö¶ÁдѰַµÄflashµÈ´æ´¢Öн顣
Start address of decompressor. here's no point in talking about virtual or physical addresses here, since the MMU will be off at the time when you call the decompressor code. You normally call the kernel at this address to start it booting. This doesn't have to be located in RAM, it can be in flash or other read-only or read-write addressable medium.
ZRELADDR
ÄÚºËÆô¶¯ÔÚRAMÖеĵØÖ·¡£Ñ¹ËõµÄÄÚºËÓ³Ïñ±»½âѹµ½Õâ¸öµØÖ·£¬È»ºóÖ´ÐС£
This is the address where the decompressed kernel will be written, and eventually executed. The following constraint must be valid:
&nbs ......
¡¾ÎÊÌâ¡¿£º
ÀûÓÃSSHÉÏ´«Ñ¹ËõÎļþµ½LinuxϵͳµÄ²âÊÔ»úÆ÷ÉÏ£¬×ÜÊÇÌáʾ“Encounntered 1 errors during the transfer”ÐÅÏ¢¡£
¡¾½â¾ö·½·¨¡¿
°ÑÒªÉÏ´«µÄÎļþ·Åµ½ÆäËüÅÌÏ£¬ÔÙÉÏ´«£¬¾Í¿ÉÒÔÁË¡£
ÊÇʲôÔÒòÄØ£¿Ã»Ã÷°×¡£¡£¡£¡£¡£¡£ ......
µÚÒ»£º
ÏÂÔØ°²×°Îļþ£º
jdk1.6: wget http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/jdk-6u17-linux-x64-rpm.bin?BundledLineItemUUID=MAhIBe.nJasAAAEl91kuXXad&OrderID=MwxIBe.nEvEAAAEl7FkuXXad&ProductID=RPVIBe.onOYAAAEk8edn5G0y&FileName=/jdk-6u17-linux-x64-rpm.bin
tomcat6.0.*: wget http://apache.siamwebhosting.com/tomcat/tomcat-6/v6.0.20/bin/apache-tomcat-6.0.20.tar.gz
µÚ¶þ£º°²×°
jdkµÄ°²×°£º
°²×°Ç°ÏÈÐ¶ÔØÔÀ´µÄjdk£¬¾ßÌå²½ÖèÈçÏ£º
[root#]rpm -qa | grep gcj ← È·ÈÏgcjµÄ°æ±¾ºÅ
[root#]gcj
yum -y remove java-1.4.2-gcj-compat ← Ð¶ÔØgcj
ÍêÁË£¬ÔÚÖ´ÐÐjava -version¿´¿´ÊÇ·ñÐ¶ÔØ³É¹¦£¬Èç¹û³É¹¦µÄ»°£¬Õâ¸öÃüÁîÊÇûÓнá¹ûµÄ
[root#]mv save-filename jdk-6u17-linux-x64-rpm.bin
[root#]chmod +x jdk-6u17-linux-x64-rpm.bin
[root#]./jdk-6u17-linux-x64-rpm.bin
Ò»Ö±»Ø³µ£¬ÐèÒªÊäÈëµÄÊäÈëy¼´¿É
tomcatÖ±ÐèÒª½âѹ¾Í¿ÉÒÔÁË
µÚÈý£ºÅäÖãº
ÔÚ/etc/profileÎļþµÄĩβ¼ÓÉÏÈçÏÂÅäÖãº
expo ......
Ò»¡¢GCC (×î×î³£¼û:gcc hello.c –o hello) ¢Ù³£ÓÃÑ¡Ïî -c:½ö¶ÔÔ´Îļþ½øÐбàÒë
-o:¶ÔÉú³ÉµÄ´úÂë½øÐÐÓÅ»¯£¬ÓÐ0£¬1£¬2£¬3ËĸöµÈ¼¶£¬Ä¬ÈÏΪ2
-g:¼ÓÈëµ÷ÊÔÐÅÏ¢
-I dir:±àÒëÔ´ÎļþÊÇÔö¼ÓÒ»¸öËÑË÷¿âÎļþµÄĿ¼
-w:½ûÖ¹ËùÓо¯¸æ
-W warning:ÔÊÐíwarningÕâÑùµÄ¾¯¸æ ¢ÚgccÎļþÀ©Õ¹Ãû¹æ·¶ .i:Ô¤´¦ÀíºóµÄcÓïÑÔÔ´³ÌÐò
.ii:Ô¤´¦ÀíºóµÄC++ÓïÑÔ³ÌÐò
.s:Ô¤´¦ÀíºóµÄ»ã±à³ÌÐò
.S:δԤ´¦ÀíµÄ»ã±à³ÌÐò
.o:Ä¿±êÎļþ ¢ÛgccʹÓþÙÀý 1£©Éú³ÉÔ¤´¦ÀíÎļþ
gcc –E hello.c –o hello.i
˵Ã÷: -E Ö»¼¤»îÔ¤´¦Àí¡£
2£©Éú³É»ã±àÎļþ
gcc –S hello.c –o hello.s
˵Ã÷£º-S Ö»¼¤»îÔ¤´¦ÀíºÍ±àÒ룬¾ÍÊÇÖ¸°ÑÎļþ±àÒë³ÉΪ»ã±à´úÂë¡£
3£©Éú³ÉÄ¿±êÎļþ
gcc –c hello.c –o hello.o
˵Ã÷£º-c:½ö¶ÔÔ´Îļþ½øÐбàÒë¡£
4£©Éú³É¿ÉÖ´ÐÐÎļþ
gcc hello.c –o hello
5)±àÒë¶à¸öÎļþ
Ŀ¼½á¹¹Ò»£º
±àÒëÃüÁgcc ......