摘要： To make samba shard folder permission clear, there are 3 kind of permission need to be paid attention: 1. permission written in /etc/samba/smb.conf of 阅读全文

摘要： when ping, specifying the length of the packet by: Actually default is -l 32, so if we omit the last option, the sent packets are the same. This packe 阅读全文

摘要： before anything.. sizeof is an operand! sizeof is an operand! sizeof is an operand! 重要なことは三回にしませんね！ int *ptr; sizeof *ptr; = sizeof (int); the followi 阅读全文

摘要： Install docker from official site, in windows. or install docker from repo as official site told, in linux.. after installation, we run by: (windows s 阅读全文

摘要： theme is from here Note: writing jekyll blogs should not contain any chars other than ascii, otherwise github.io will not compile. 阅读全文

摘要： login as user, do the following: update rvm, install new ruby.. if need to specify some version of ruby to be default chosen when opening new terms, r 阅读全文

摘要： first install valgrind, its newest ver is 3.11, and stops updating since 2015/12. in centos, yum installs 3.10 ver. using valgrind ./buggy.out to exec 阅读全文

摘要： This file includes 4 data-structures.. Insteresting because they are written in 1994.. to make it easier using the structures.. LIST: the common usage 阅读全文

摘要： Sometimes running program in Unix will fail without any debugging info or warnings because of the laziness of programmer.. So if need to find the righ 阅读全文

摘要： well, strcpy differs from memcpy in that it stops copy at \0 the format specifier is a string.. which can be assigned to a char*.. like.. strcpy(a,"%d 阅读全文