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tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
...s的快速回收，默认为0，表示关闭。
net.ipv4.tcp_fin_timeout 修改系統默认的 TIMEOUT 时间
查看系统TCP连接资源命令
netstat
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
一般情况下，系统的socket资源默认5000个。（非官方...
clang: how to list supported target architectures?
...RM may have several LLVM architectures such as regular ARM, Thumb and AArch64. This is mainly for implementation convenience because the different execution modes have very different instruction encodings and semantics.
For each of the architectures listed, llc -march=ARCH -mattr=help will list "ava...
List all the files that ever existed in a Git repository
...it-log --name-status, which echoes something like:
commit afdbbaf52ab24ef7ce1daaf75f3aaf18c4d2fee0
Author: Your Name <your@email.com>
Date: Tue Aug 12 13:28:34 2008 -0700
Added test file.
A test
Then extract files added:
git-log --name-status | sed -ne 's/^A[^u]//p' | sort -u...
What happens if a Android Service is started multiple times?
...
The Service will only run in one instance. However, everytime you start the service, the onStartCommand() method is called.
This is documented here
share
...
Visualizing branch topology in Git
...
Use git log --graph or gitk. (Both also accept --all, which will show all the branches instead of just the current one.)
For branch names and a compact view, try:
git log --graph --decorate --oneline
...
Python: Ignore 'Incorrect padding' error when base64 decoding
I have some data that is base64 encoded that I want to convert back to binary even if there is a padding error in it. If I use
...
What is the bit size of long on 64-bit Windows?
Not to long ago, someone told me that long are not 64 bits on 64 bit machines and I should always use int . This did not make sense to me. I have seen docs (such as the one on Apple's official site) say that long are indeed 64 bits when compiling for a 64-bit CPU. I looked up what it was on 64-...
How to check whether a string is Base64 encoded or not
I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
...
How do I encode and decode a base64 string?
...
Encode
public static string Base64Encode(string plainText) {
var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
return System.Convert.ToBase64String(plainTextBytes);
}
Decode
public static string Base64Decode(string base64EncodedData...
How to show all shared libraries used by executables in Linux?
...tput (for just the /bin directory) will look something like this:
1 /lib64/libexpat.so.0
1 /lib64/libgcc_s.so.1
1 /lib64/libnsl.so.1
1 /lib64/libpcre.so.0
1 /lib64/libproc-3.2.7.so
1 /usr/lib64/libbeecrypt.so.6
1 /usr/lib64/libbz2.so.1
1 /usr/lib64/libelf.so.1
1 /usr/lib64/libpopt...