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Èç¹ûÔÚlinux C\C++»·¾³ÏÂÅжÏij¸öÎļþÊÇ·ñ´æÔÚ£¬¿ÉÒÔʹÓÃaccessº¯Êý£º
#include <unistd.h>
#include <stdio.h>
int main()
{
        const char* file1 = "access.cpp";
        const char* file2 = "access1.cpp";
        printf("%s:%d\n", file1, access(file1, F_OK));
        printf("%s:%d\n", file2, access(file2, F_OK));
        return 0;
}
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access.cpp:0
access1.cpp:-1


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Netstat -tln ÃüÁîÊÇÓÃÀ´²é¿´linuxµÄ¶Ë¿ÚʹÓÃÇé¿ö
/etc/init.d/vsftp start ÊÇÓÃÀ´Æô¶¯ftp¶Ë¿Ú~£¡
¿´Îļþ/etc/services
netstat
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netstat -a
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sudo netstat -ap
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nmap £¼É¨ÃèÀàÐÍ£¾£¼É¨Ã ......

linuxÄں˱àÒë¶þ

1.Äں˱àÒë±ØÐëÔÚroot»·¾³Ï£¬¶øUbuntu×°ºóûÓÐrootÓû§£¬ËùÒÔÉèÖÃrootÃÜÂë
 sudo passwd root
2.su»Ø³µ£¬ÊäÈëÃÜÂë¾ÍÊÇÒÔrootÉí·ÝÁË£¬
3.ÏÂÔØlinuxÄں˲¢½«Æä×ªÒÆµ½/usr/srcÎļþ¼Ð
cp Îļþ /usr/src
4.tar -jxvf linux-2.6.29.4.tar.bz2
  ......

Linux google chrome µ¼ÈëÖ¤Êé

Linux°æµÄgoogle-chrome£¬ÎªÁË"²»ÖØÔìÂÖ×Ó"£¬Ê¹ÓõÚÈý·½¹¤¾ß½øÐÐÖ¤ÊéµÄÑéÖ¤¡£
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yum install nss-tools
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http://blog.avirtualhome.com/2010/02/02/adding-ssl-certificates-to-google-chrome-linux-ubuntu/
¿¼Âǵ½Ò»Ð©Ó¢ ......

linux£ºDynamic MMap ran out of room

    µ±ÎÒµÄubuntu½øÐÐÈç³£µÄ¸üÐÂʱ£¬Í»È»¸æËßÎÒDynamic MMap ran out of room.È»ºógoogleµÃ½â·¨£¬¼Ç¼ÈçÏ£º
    sudo gedit /etc/apt/apt.conf.d/70debconf
    ÔöÌíÒÔÏÂÁ½ÐУºAPT::Cache-Limit "200000000";
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configure: error: Unable to find libgd.(a|so)
Èç¹ûʹÓõÄÊÇubuntu»òdebian¾ÍºÜ¼òµ¥ÁË£¬Ö±½Ósudo apt-get install apache2 libapache2-mod-php5 php5 php5-gd ¾Í»ù±¾Éϸ㶨£¬µ«ÊÇÓÃÔ´´úÂë°²×°»¹ÊǺÜÂé·³¡«
wget http://www.boutell.com/gd/http/gd-2.0.11.tar.gz
tar zxvf gd-2.0.11 ......
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