摘要：First confirm that you have root privilege. Second check the config of kernel that you have the configs on: Last you confirm you have your debugfs/tra 阅读全文

摘要：libev First let's talk about libev, it is a lib used in ss. The coding style of libev is ugly. To see man page of libev by: man ./ev.3 3 files need to 阅读全文

摘要：Before using stap, the kernel-debuginfo-$(uname -r), kernel-debuginfo-common-$(uname -m)-$(uname -r) and kernel-devel-$(uname -r) should be installed. 阅读全文

摘要：However till now golang's debug functionality seems far from okay. During debug you cannot print map objects. And also from debugging related aspects, 阅读全文

摘要：Before preceding, several things need to be checked: There are too many tutorials on how to build with ct-ng, I only list several useful steps for fut 阅读全文

摘要：1. malloc memory should always use the following form: 2. memset memory to 0 should use the form: 3. malloc(0) might also return address which is non- 阅读全文

摘要：My summary after reading this. Before doing large memory writes: _mm*_stream_s[i,s,d]*: non-temporal memory store: When data is produced and not (imme 阅读全文

摘要：Some definitive names: 1. Socket: the thing that plug into the motherboard slot; 2. Core: multiple counts of these hardware things are included in 1 c 阅读全文

摘要：some frequently used AC macros: AC_INIT :must AC_OUTPUT :must AC_PREREQ :determine ac version so that needed features are included AC_CONFIG_SRCDIR :d 阅读全文

摘要：Sometimes we build a program as release and when debugging, some variables cannot be printed out, and displayed as optimized out. That is because the 阅读全文

摘要：from here. php basics in PHP, variables are defined as $_alphanum variables should always prefixed a $ variables defined/assigned outside of a functio 阅读全文

摘要：To use composer, first system must satisfy php environment: To install composer, try either: enable packagist repo globally: [its speed seems not fast 阅读全文

摘要：SNMP is a protocol that enables server remote-info-exchange. Which according to wikipedia: it [collecting and organizing information about managed dev 阅读全文

摘要：before talking about Makefiles, compilers are important pre-knowledge. first compile a executable ELF file, by: if we are going to compile one/several 阅读全文

摘要：Maven, is actually a java project manager.. Installing maven in windows need to set system environment vars like JAVA_HOME and PATH.. And it is rather 阅读全文

摘要：Find the authoritative server of a domain, by: find actual IP of a sub-domain, by: What is authoritative server of dns? [Quote]An authoritative name s 阅读全文

摘要：In short, we have some sort of algorithms to gen pair of private and public keys. The public key is stored in a certificate and the private key is usu 阅读全文

摘要：shortcuts: c-w: delete word before c-a: move to first char c-y: delete everything after cursor c-z: exit to user-view c-n, c-p: trivial c-b, c-f: back 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：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