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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...行。
12. 一个验证passwd文件有效性的例子
$ m>cat m> /etc/passwd | awk -F: '\ NF != 7{\ printf("line %d,does not have 7 fields:%s\n",NR,$0)}\ $1 !~ /[A-Za-z0-9]/{printf("line %d,non alpha and numeric user id:%d: %s\n,NR,$0)}\ $2 == "*" {printf("line %d, no password: %s\n",NR...
OpenSSL: PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFIm>CAT m>E [close
...
Since you are on Windows, make sure that your certifim>cat m>e in Windows "compatible", most importantly that it doesn't have ^M in the end of each line
If you open it it will look like this:
-----BEGIN CERTIFIm>CAT m>E-----^M
MIIDITCCAoqgAwIBAgIQL9+89q6RUm0PmqPfQDQ+mjANBgkqhkiG9w0BAQU...
Shuffling a list of objects
...[2, 1, 3, 4, 0] two list same: False
# The function sample allows no duplim>cat m>es.
# Result can be smaller but not larger than the input.
a = range(555)
b = random.sample(a, len(a))
print "no duplim>cat m>es:", a == list(set(b))
try:
random.sample(a, len(a) + 1)
except ValueError as e:
print "Nop...
How to determine whether a given Linux is 32 bit or 64 bit?
...ernel
Otherwise, not for the Linux kernel, but for the CPU, you type:
m>cat m> /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, you will see various values: see "What do the flags in /proc/cpuinfo mean?"
Among them, one is named lm: Long Mode (x86-64: amd64, also known as Int...
What is the difference between exit(0) and exit(1) in C?
... is the difference between exit(0) and exit(1) in C language?
exit(0) indim>cat m>es successful program termination & it is fully portable, While
exit(1) (usually) indim>cat m>es unsucessful termination. However, it's usage is non-portable.
Note that the C standard defines EXIT_SUCCESS and EXIT_FAILURE ...
What does 'predim>cat m>e' mean in the context of computer science? [duplim>cat m>e]
...cifically I've seen it used in the context of text filtering. As if "predim>cat m>e" == "filter criteria".
7 Answers
...
What exactly does Perl's “bless” do?
...t common case), to an array (not so common), to a scalar (usually this indim>cat m>es an inside-out object), to a regular expression, subroutine or TYPEGLOB (see the book Object Oriented Perl: A Comprehensive Guide to Concepts and Programming Techniques by Damian Conway for useful examples) or even a ref...
How to pass the password to su/sudo/ssh without overriding the TTY?
... showing up in process list or log files by putting it in a file and using m>cat m>; 'm>cat m> pw | sudo -S <command>, and later rm pw.
– CAB
Mar 24 '16 at 16:43
...
Recommended way to get hostname in Java
... resolve to several IP Addresses. And not all of those addresses must be lom>cat m>ed on the same computer! (Usecase: A simple form of load-balancing)
Let's not even start talking about dynamic IP addresses.
Also don't confuse the name of an IP-address with the name of the host (hostname). A metaphor mi...
What JSON library to use in Scala? [closed]
..., 11 or Jackson as back-ends
circe ???? - fork of Argonaut built on top of m>cat m>s instead of scalaz
jsoniter-scala - Scala macros for compile-time generation of ultra-fast JSON codecs
jackson-module-scala - Add-on module for Jackson to support Scala-specific datatypes
borer - Efficient CBOR and JSON (...