wiki:jazz/10-05-11
close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": /usr/lib/python2.7/dist-packages/libsvn/_fs.so: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Version 8 (modified by jazz, 14 years ago) (diff)

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2010-05-11

Linux

  • acct - The GNU Accounting utilities for process and login accounting
    • Phantom Cluster 的架構圖中看到 psacct package,原來是可以拿來統計不同使用者登入登出跟執行指令的工具啊!! (2009-09-23)
    • ac - 統計使用者連線時間 (單位: 小時) (Ref: psacct & checkinstall 使用備忘)
    • sa - 統計執行過的程序
      ~$ sudo apt-get install acct
      ~$ ac -d                 # 依日期統計
      ~$ ac -p                 # 依使用者帳號統計
      ~$ ac -f /var/log/wtmp.1 # 指定來源檔案 (預設 /var/log/wtmp) - 因此只能統計近期的使用情形
      ~$ sudo sa -a            # 顯示所有程序記錄
      ~$ sudo sa -m            # 依使用者統計
      

Perl + SQLite3

  • [專案] 實作 Perl + SQLite
    • 其他參考連結
    • [參考] SQLite examples with Bash, Perl and Python (2007-03-01)
    • 環境: Debian 5.0.4 , amd64 核心
      jazz@drbl:~$ lsb_release -a
      No LSB modules are available.
      Distributor ID: Debian
      Description:    Debian GNU/Linux 5.0.4 (lenny)
      Release:        5.0.4
      Codename:       lenny
      jazz@drbl:~$ uname -a
      Linux drbl 2.6.26-lustre-amd64 #1 SMP Sun Jun 28 18:28:02 CST 2009 x86_64 GNU/Linux
      
    • 相關套件: sqlite3,libsqlite3-0,libdbd-sqlite3-perl
      jazz@drbl:~$ sudo apt-get install sqlite3 libdbd-sqlite3-perl libsqlite3-0
      jazz@drbl:~$ dpkg -l | grep sqlite
      ii  libdbd-sqlite3-perl              1.14-3                         Perl DBI driver with a self-contained RDBMS
      ii  libsqlite3-0                     3.5.9-6                        SQLite 3 shared library
      ii  sqlite3                          3.5.9-6                        A command line interface for SQLite 3
      
    • 使用範例程式建立 test.db
      jazz@drbl:~$ vi perlsqlite3.pl
      jazz@drbl:~$ chmod a+x perlsqlite3.pl
      jazz@drbl:~$ ./perlsqlite3.pl
      jazz@drbl:~$ file test.db
      test.db: SQLite 3.x database
      jazz@drbl:~$ sqlite3 test.db "select * from n"
      1|john|smith
      
      #!/usr/bin/perl -w
      use DBI;
      use strict;
      my $db = DBI->connect("dbi:SQLite:test.db", "", "",
      {RaiseError => 1, AutoCommit => 1});
      
      $db->do("CREATE TABLE n (id INTEGER PRIMARY KEY, f TEXT, l TEXT)");
      $db->do("INSERT INTO n VALUES (NULL, 'john', 'smith')");
      my $all = $db->selectall_arrayref("SELECT * FROM n");
      
      foreach my $row (@$all) {
      my ($id, $first, $last) = @$row;
      print "$id|$first|$last";
      }