linux¶àÏß³ÌÉè¼Æ(zz)
linux¶àÏß³ÌÉè¼Æ
¡¡¡¡1 ÒýÑÔ
¡¡¡¡Ị̈߳¨thread£©¼¼ÊõÔçÔÚ60Äê´ú¾Í±»Ìá³ö£¬µ«ÕæÕýÓ¦ÓöàÏ̵߳½²Ù×÷ϵͳÖÐÈ¥£¬ÊÇÔÚ80Äê´úÖÐÆÚ£¬solarisÊÇÕâ·½ÃæµÄٮٮÕß¡£´«Í³µÄUnixÒ²Ö§³ÖÏ̵߳ĸÅÄµ«ÊÇÔÚÒ»¸ö½ø³Ì£¨process£©ÖÐÖ»ÔÊÐíÓÐÒ»¸öỊ̈߳¬ÕâÑù¶àÏ߳̾ÍÒâζ×Ŷà½ø³Ì¡£ÏÖÔÚ£¬¶àÏ̼߳¼ÊõÒѾ±»Ðí¶à²Ù×÷ϵͳËùÖ§³Ö£¬°üÀ¨Windows/NT£¬µ±È»£¬Ò²°üÀ¨Linux¡£
¡¡¡¡ÎªÊ²Ã´ÓÐÁ˽ø³ÌµÄ¸ÅÄîºó£¬»¹ÒªÔÙÒýÈëÏß³ÌÄØ£¿Ê¹ÓöàÏ̵߳½µ×ÓÐÄÄЩºÃ´¦£¿Ê²Ã´µÄϵͳӦ¸ÃÑ¡ÓöàỊ̈߳¿ÎÒÃÇÊ×ÏȱØÐë»Ø´ðÕâЩÎÊÌâ¡£
¡¡¡¡Ê¹ÓöàÏ̵߳ÄÀíÓÉÖ®Ò»ÊǺͽø³ÌÏà±È£¬ËüÊÇÒ»Öַdz£"½Ú¼ó"µÄ¶àÈÎÎñ²Ù×÷·½Ê½¡£ÎÒÃÇÖªµÀ£¬ÔÚLinuxϵͳÏ£¬Æô¶¯Ò»¸öеĽø³Ì±ØÐë·ÖÅä¸øËü¶ÀÁ¢µÄµØÖ·¿Õ¼ä£¬½¨Á¢ÖÚ¶àµÄÊý¾Ý±íÀ´Î¬»¤ËüµÄ´úÂë¶Î¡¢¶ÑÕ»¶ÎºÍÊý¾Ý¶Î£¬ÕâÊÇÒ»ÖÖ"°º¹ó"µÄ¶àÈÎÎñ¹¤×÷·½Ê½¡£¶øÔËÐÐÓÚÒ»¸ö½ø³ÌÖеĶà¸öỊ̈߳¬ËüÃDZ˴ËÖ®¼äʹÓÃÏàͬµÄµØÖ·¿Õ¼ä£¬¹²Ïí´ó²¿·ÖÊý¾Ý£¬Æô¶¯Ò»¸öÏß³ÌËù»¨·ÑµÄ¿Õ¼äԶԶСÓÚÆô¶¯Ò»¸ö½ø³ÌËù»¨·ÑµÄ¿Õ¼ä£¬¶øÇÒ£¬Ï̼߳ä±Ë´ËÇл»ËùÐèµÄʱ¼äҲԶԶСÓÚ½ø³Ì¼äÇл»ËùÐèÒªµÄʱ¼ä¡£¾Ýͳ¼Æ£¬×ܵÄ˵À´£¬Ò»¸ö½ø³ÌµÄ¿ªÏú´óÔ¼ÊÇÒ»¸öÏ߳̿ªÏúµÄ30±¶×óÓÒ£¬µ±È»£¬ÔÚ¾ßÌåµÄϵͳÉÏ£¬Õâ¸öÊý¾Ý¿ÉÄÜ»áÓнϴóµÄÇø±ð¡£
¡¡¡¡Ê¹ÓöàÏ̵߳ÄÀíÓÉÖ®¶þÊÇÏ̼߳䷽±ãµÄͨÐÅ»úÖÆ¡£¶Ô²»Í¬½ø³ÌÀ´Ëµ£¬ËüÃǾßÓжÀÁ¢µÄÊý¾Ý¿Õ¼ä£¬Òª½øÐÐÊý¾ÝµÄ´«µÝÖ»ÄÜͨ¹ýͨÐŵķ½Ê½½øÐУ¬ÕâÖÖ·½Ê½²»½ö·Ñʱ£¬¶øÇҺܲ»·½±ã¡£Ïß³ÌÔò²»È»£¬ÓÉÓÚͬһ½ø³ÌϵÄÏß³ÌÖ®¼ä¹²ÏíÊý¾Ý¿Õ¼ä£¬ËùÒÔÒ»¸öÏ̵߳ÄÊý¾Ý¿ÉÒÔÖ±½ÓΪÆäËüÏß³ÌËùÓã¬Õâ²»½ö¿ì½Ý£¬¶øÇÒ·½±ã¡£µ±È»£¬Êý¾ÝµÄ¹²ÏíÒ²´øÀ´ÆäËûһЩÎÊÌ⣬ÓеıäÁ¿²»ÄÜͬʱ±»Á½¸öÏß³ÌËùÐ޸ģ¬ÓеÄ×Ó³ÌÐòÖÐÉùÃ÷ΪstaticµÄÊý¾Ý¸üÓпÉÄܸø¶àÏ̳߳ÌÐò´øÀ´ÔÖÄÑÐԵĴò»÷£¬ÕâЩÕýÊDZàд¶àÏ̳߳ÌÐòʱ×îÐèҪעÒâµÄµØ·½¡£
¡¡¡¡³ýÁËÒÔÉÏËù˵µÄÓŵãÍ⣬²»ºÍ½ø³Ì±È½Ï£¬¶àÏ̳߳ÌÐò×÷ΪһÖÖ¶àÈÎÎñ¡¢²¢·¢µÄ¹¤×÷·½Ê½£¬µ±È»ÓÐÒÔϵÄÓŵ㣺
¡¡¡¡1) Ìá¸ßÓ¦ÓóÌÐòÏìÓ¦¡£Õâ¶ÔͼÐνçÃæµÄ³ÌÐòÓÈÆäÓÐÒâÒ壬µ±Ò»¸ö²Ù×÷ºÄʱºÜ³¤Ê±£¬Õû¸öϵͳ¶¼»áµÈ´ýÕâ¸ö²Ù×÷£¬´Ëʱ³ÌÐò²»»áÏìÓ¦¼üÅÌ¡¢Êó±ê¡¢²Ëµ¥µÄ²Ù×÷£¬¶øʹÓöàÏ̼߳¼Êõ£¬½«ºÄʱ³¤µÄ²Ù×÷£¨time consuming£©ÖÃÓÚÒ»¸öеÄỊ̈߳¬¿ÉÒÔ±ÜÃâÕâÖÖÞÏÞεÄÇé¿ö¡£
¡¡¡¡2) ʹ¶àCPUϵͳ¸ü¼ÓÓÐЧ¡£²Ù×÷ϵͳ»á±£Ö¤µ±Ïß³ÌÊý²»´óÓÚCPUÊýĿʱ£¬²»Í¬µÄÏß³ÌÔËÐÐÓÚ²»Í¬µÄCPUÉÏ¡£
¡¡¡¡3) ¸ÄÉƳÌÐò½á¹¹¡£Ò»¸ö¼È³¤ÓÖ¸´ÔӵĽø³Ì¿ÉÒÔ¿¼ÂÇ·ÖΪ¶à¸öỊ̈߳¬³ÉΪ¼¸¸ö¶ÀÁ¢»ò°ë¶ÀÁ¢µÄÔËÐв¿·Ö£¬ÕâÑùµÄ³ÌÐò»áÀûÓÚÀí½âºÍÐÞ¸
Ïà¹ØÎĵµ£º
ѹËõÃüÁ
*.Z compress ³Ìʽ壓縮µÄ檔°¸£»
*.bz2 bzip2 ³Ìʽ壓縮µÄ檔°¸£»
*.gz gzip ³Ìʽ壓縮µÄ檔°¸£»
*.tar tar ³Ìʽ´ò°üµÄ資ÁÏ£¬ ......
ʹÓ÷½Ê½ : chmod [-cfvR] [--help] [--version] mode file...
˵Ã÷ : Linux/Unix µÄµµ°¸´æȡȨÏÞ·ÖΪÈý¼¶ : µµ°¸ÓµÓÐÕß¡¢Èº×é¡¢ÆäËû¡£ÀûÓà chmod ¿ÉÒÔ½åÒÔ¿ØÖƵµ°¸ÈçºÎ±»ËûÈËËù´æÈ¡¡£
mode : ȨÏÞÉ趨×Ö´®£¬¸ñʽÈçÏ : [ugoa...][[+-=][rwxX]...][,...]£¬ÆäÖÐu ±íʾ¸Ãµµ°¸µÄÓµÓÐÕߣ¬g ±íʾÓë¸Ãµµ°¸µÄÓµÓÐÕßÊôÓÚͬһ¸öÈºÌ ......
linuxÄÚºËinit½ø³Ìº¯ÊýµÄ²¿·Ö´úÂëÈçÏ£º 01 if (execute_command)
02 run_init_process(execute_command);
03
04 run_init_process("/sbin/init");
05 run_init_process("/etc/init");
06 run_init_process("/bin/init");
07 run_init_process("/ ......
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>
#define MAX 1024
int get_file_count(char *root)
{
DIR *dir;
struct dirent * ptr;
int total = 0;
char path[MAX];
dir = opendir(root ......
Linux C + + Training
Syllabus
________________________________________
1, Linux Operating System
System Environment: Ubuntu GNU / Linux, RedHat Linux AS5,
FreeBSD
Course Requirements: proficient use of commonly used Linux
/ UNIX commands.
Time: 1 week.
______________________________ ......