ÊäÈësudo passwd root
ºó³öÏÖ
Enter new UNIX password: --- > ÉèÖÃroot ÃÜÂë
Retype new UNIX password: --> Öظ´ÕâÑù
Õâ¸öunix×ÖÑùÔõôÅܵ½linuxÀïÁË£¬ÊDz»ÊÇÒòΪsudoÊÇ´ÓunixÒÆÖµÀ´µÄ?
Õâ¸öÎÊÌâ²»ÊÇÓësudoÏà¹Ø£¬ÊÇpasswdÏà¹ØµÄ,passwdÀïÃæ¾ÍÊÇÕâÑùÏÔʾµÄ£¬
²»ÓüÓsudo£¬¸Ä×Ô¼ºµÄ ......
linuxÏ´DNSʱ ÊäÈënslookup¼ì²éʱºò£¬³öÏÖ
server can't find www.test.com£»servfail
server can't find 12.36.168.192.in-addr.arpa£»servfail
ÊÇʲôÒâ˼¡£ ÎÒµÄÕýÏò½âÎöºÍ·´Ïò½âÎö¶¼²»ÐС£¡£
ÁíÍâÎÒµÄÅäÖÃÎļþÓÃnamed -g È¥¼ì²â£¬³öÏÖ
starting BIND 9.2.1 -g
using 1 ......
·¢Ò»¸öÌù£¬¶þ¸öÎÊÌâ¸÷¶þÊ®·Ö
1.linuxʹÓÃbjam -sTOOLS=gcc installºó£¬µ«ÊÇÔÚ±àÒëÖîÈç libs/filesystem/example/simple_ls.cpp ʱ£º
g++ simple_ls.cpp -lboost_filesystem -o simple_lsʱ£¬²»ÄܱàÒëͨ¹ý£¬Ìáʾ£ºld return 1 exit status.Èç¹ûʹÓÿâÄØ£¿
ls /usr/local/libÏÂÊÇÓÐlibboost_filesystem.soµÈ¿â
2. ......
ÎÒÔÚlinuxÏ¿½±´ÁËÒ»¸öС½Å±¾£¬ÄÚÈÝÈçÏÂ
#!/bin/sh
echo "What is your favourite OS?"
select var in "Linux" "Gnu Hurd" "Free BSD" "Other"; do
¡¡¡¡¡¡¡¡break;
done
echo "You have selected $var"
¿ÉÊÇÔËÐеÄʱºò³öÏÖÁËÒ»ÏÂÏÔÊ ......
´ó¼ÒºÃ£º
¹ØÓÚlinuxµÄ´®¿ÚͨÐÅÉèÖÃÓÐÒ»¸öÎÊÌâ²»Ã÷°×£¬»¹Çë´ó¼Ò°ïæ¿´Ï£º
ÒªÉèÖÃΪ×èÈûÐͶÁÈ¡£º
·½Ê½1£ºÄÇôopenµÄʱºò²»´ø O_NODELY/O_NOBLOCK Õâ¸ö²ÎÊý£¬Èç¹û´øÁ˾ÍÊÇ·Ç×èÈû
·½Ê½2£ºÍ¨¹ýÉèÖÃc_cc[VMIN] > 0Ϊ×èÈû£¬ =0 ʱΪ·Ç×èÈû
&nb ......
ee=`find . -name 'testscripts' -print`
echo $ee
if [ -f $ee ]; then
echo "find"
fi
¼ÙÈçûÓÐÃûΪ testscriptsµÄÎļþ£¬ÎªÊ²Ã´ÒÀ¾É¿ÉÒÔ´òÓ¡³ö"find"?
linux bug?
½«if [ -f $ee ]¸ÄΪ if [ -z $ee ]¾ÍokÁË...
»¹ÊÇ×Ô¼º½â¾öÁË...
......