script命令怎么在Linux中使用

script 命令怎么在Linux中使用？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。

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1、script命令描述

script命令会记录所有的操作到文件同时在屏幕上输出，直到终止登陆的会话，或使用CRTL+D，或使用exit退出则停止记录。

这个命令对于数据库的升级或是重要设置的情形下使用可以用于后续查询操作成功或失败。
用法: $ script [upgrade.log]
如果未指定日志文件名的情形，自动生成日志文件名为typescript。
如果需要输出到已经存在的日志文件，则使用 -a 参数，再接已经存在日志文件名。
如果需要在输出到日志文件的同时，也可以查看日志文件的内容，可以使用 -f 参数。

# script 帮助描述
robin@SZDB:~> man script
NAME
    script - make typescript of terminal session

SYNOPSIS
    script [-a] [-c COMMAND] [-f] [-q] [-t] [file]

DESCRIPTION
    Script makes a typescript of everything printed on your terminal.  It is useful for students who need a hardcopy record of
    an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1).

    If the argument file is given, script saves all dialogue in file.  If no file name is given, the typescript is saved in the
    file typescript.

    Options:

    -a      Append the output to file or typescript, retaining the prior contents.

    -c COMMAND
            Run the COMMAND rather than an interactive shell.  This makes it easy for a script to capture the output of a pro-
            gram that behaves differently when its stdout is not a tty.

    -f      Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and
            another can supervise real-time what is being done using `cat foo'.

    -q      Be quiet.

    -t      Output timeing data to standard error. This data contains two fields, separated by a space. The first field indi-
            cates how much time elapsed since the previous output. The second field indicates how many characters were output
            this time. This information can be used to replay typescripts with realistic typing and output delays.

2、script命令用法示例

代码如下:

a、script命令后接日志文件名
robin@SZDB:~> script test_logfile.log        #启用script
Script started, file is test_logfile.log

 .................#中间操作省略
 
robin@SZDB:~> exit    #停止script
exit
Script done, file is test_logfile.log

#查看刚刚生成的日志文件
robin@SZDB:~> more test_logfile.log
Script started on Fri 26 Apr 2013 05:45:23 PM CST
robin@SZDB:~> sid  
bash: sid: command not found
robin@SZDB:~> . ~/.bash_profile
robin@SZDB:~> sid
ORA_CRS_HOME=/opt/oracle/product/10gR2/crs
ORACLE_PATH=.:/users/robin/dba_scripts/custom/sql
ORA_ASM_HOME=/opt/oracle/product/10gR2/asm
ORACLE_SID=SYBO2SZ
ORACLE_BASE=/users/oracle
ORACLE_HOME=/users/oracle/OraHome10g
robin@SZDB:~> sql    

SQL*Plus: Release 10.2.0.3.0 - Production on Fri Apr 26 17:46:12 2013

Copyright (c) 1982, 2006, Oracle.  All Rights Reserved.

Error accessing PRODUCT_USER_PROFILE
Warning:  Product user profile information not loaded!
You may need to run PUPBLD.SQL as SYSTEM

Connected to:
Oracle Database 10g Release 10.2.0.3.0 - 64bit Production

goex_admin@SYBO2SZ> alter session set current_schema=scott;

Session altered.

goex_admin@SYBO2SZ> select * from dept;

   DEPTNO DNAME          LOC
---------- -------------- -------------
       10 ACCOUNTING     NEW YORK
       20 RESEARCH       DALLAS
       30 SALES          CHICAGO
       40 OPERATIONS     BOSTON

goex_admin@SYBO2SZ> exit
Disconnected from Oracle Database 10g Release 10.2.0.3.0 - 64bit Production
robin@SZDB:~> exit
exit

Script done on Fri 26 Apr 2013 05:46:32 PM CST  

b、script 命下直接跟脚本名的示例
robin@SZDB:~> script -c retval.sh
Script started, file is typescript
7788 SCOTT ANALYST 7566 19870419 00:00:00 3100 20
Script done, file is typescript

#被执行的shell脚本的内容
# Author : Robinson
# Blog   : http://blog.csdn.ner/robinson_0612

robin@SZDB:~> more ~/dba_scripts/custom/bin/retval.sh
#!/bin/bash
RETVAL=`sqlplus -silent scott/tiger <SET PAGESIZE 0 FEEDBACK OFF VERIFY OFF HEADING OFF ECHO OFF
SELECT * FROM emp WHERE ename='SCOTT';
EXIT;
EOF`
if [ -z "$RETVAL" ]; then
 echo "No rows returned from database"
 exit 0
else
 echo $RETVAL
fi

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