아장아장 프로그래밍2

find . -name "A*log.*" -mtime +31 -exec ls -alh {} \;

find . -name "A*log.*" -mtime +31 -exec rm {} \;

.  Base 64 Encoding with URL and Filename Safe Alphabet

   The Base 64 encoding with an URL and filename safe alphabet has been
   used in [12].

   An alternative alphabet has been suggested that would use "~" as the
   63rd character.  Since the "~" character has special meaning in some
   file system environments, the encoding described in this section is
   recommended instead.  The remaining unreserved URI character is ".",
   but some file system environments do not permit multiple "." in a
   filename, thus making the "." character unattractive as well.

   The pad character "=" is typically percent-encoded when used in an
   URI [9], but if the data length is known implicitly, this can be
   avoided by skipping the padding; see section 3.2.

   This encoding may be referred to as "base64url".  This encoding
   should not be regarded as the same as the "base64" encoding and
   should not be referred to as only "base64".  Unless clarified
   otherwise, "base64" refers to the base 64 in the previous section.

   This encoding is technically identical to the previous one, except 

public class A {

public A getInstance (){ return B._instance();}

private static class B{

private A _instance = new A();

}

}

~/test/shPractice which grep

grep: aliased to grep  --color=auto --exclude-dir={.bzr,CVS,.git,.hg,.svn}

~/test/shPractice which -a grep

grep: aliased to grep  --color=auto --exclude-dir={.bzr,CVS,.git,.hg,.svn}

/usr/bin/grep

~/test/shPractice mkdir -p ./test/test2/test3

~/test/shPractice cd test/test2/test3/

~/test/shPractice mkdir -m 755 /test/testtest/testtesttest   

cut -d /; -f 3,4 text.log

7117  cat error_json_2016-06-08.log|cut -d ;     (실패)

 7118  cat error_json_2016-06-08.log|cut -d;    (실패)

 7119  cat error_json_2016-06-08.log|cut -d\;    (실패)

usage: cut -b list [-n] [file ...]

       cut -c list [file ...]

       cut -f list [-s] [-d delim] [file ...]

 7120 cat error_json_2016-06-08.log|cut -d'\;' (실패)

 7127  cat error_json_2016-06-08.log|cut -d: -f1 (성공) -- -d랑 -f를 같이 써야되는군!

 7197  cat 1139_json.log|cut -d ';'    (실패)

 7198  cat 1139_json.log|cut -d '='    (실패)

 7199  cut 1139_json.log -d '='    (실패)

 7201  cat 1139_json.log |cut -d =    (실패)

 7202  cat 1139_json.log |cut -d=    (실패)

 7203  cat 1139_json.log |cut -f -d=     (실패)

 7203  cat 1139_json.log |cut -f1 -d=    (성공)

 7204  cat 1139_json.log |cut -cf -d=    (실패)

cut: [-cf] list: illegal list value

 7205  cat 1139_json.log |cut -cf    (실패)

 7207  cat 1139_json.log |cut -d '=' -f 2     (실패)

git config --global alias.co checkout
git config --global alias.ci commit
git config --global alias.st status
git config --global alias.br branch
git config --global alias.hist 'log --pretty=format:"%h %ad | %s%d [%an]" --graph --date=short'
git config --global alias.type 'cat-file -t' 

git config --global alias.dump 'cat-file -p'