Two linux commands

Two linux commands-general Linux technology-Linux technology and application information. For details, refer to the following section. I learned two commands today. They are actually very simple, but I seldom use them, but I don't know them. Here is a simple record.

Tar
I used it almost every day, but today I encountered a new problem. How can I keep some specified directories in the package? The procedure is as follows:
Tar-cvf target.tar -- exclude = directory 1 -- exlude = directory 2 ...... Source directory

Script
This command is used to save the operation process in the log. The securecrt has the log setting function. I didn't expect it to be available on the operating system. The syntax and usage are very simple:
Syntax: script [-a] [-f] [-q] [-t] [file]

1. Execute the script command
[Mysql @ bj122 mysql] $ script
Script started, file is typescript

2. Execute some commands at will
[Mysql @ bj122 mysql] $ ls
Charge_2008 checklog dbalert.tar mysql pointcard_slave.tar.gz
Charge_alert checklog.tar etl_daily MysqlAlert. class temp
Charge_alert.tar checklog.tar.gz etl_daily.tar mysql_db.tar ttt.txt
Charge_stat_for_yuhui cron_mysql ftptst. ctl mysql-standard-5.0.27-linux-i686-glibc23 typescript
Charge_stat_for_yuhui.tar dbalert ip.txt nohup. out
[Mysql @ bj122 mysql] $ w
17:34:09 up, 5 users, load average: 0.01, 0.02, 0.00
User tty from login @ IDLE JCPU PCPU WHAT
Search pts/0 203.86.63.98 am 0.41 s 0.04 s-bash
Zxzhai pts/2 203.86.63.98 am 0.00 s 0.42 s 0.11 s-bash
Zxzhai pts/3 203.86.63.98 am 1: 58 m 0.15 s 0.03 s ssh-p7522 192.168.160.32-lzzx
Search pts/4 203.86.63.98 am 3: 03 m 0.12 s 0.03 s-bash
Search pts/5 203.86.63.98 pm 3: 19 m 0.20 s 0.04 s-bash

3. Exit script
[Mysql @ bj122 mysql] $ exit
Exit
Script done, file is typescript

4. logs are recorded in typescript files.
[Mysql @ bj122 mysql] $ more typescript
Script started on Wed Jul 2 17:34:03 2008
[Mysql @ bj122 mysql] $ ls
Charge_2008 checklog dbalert.tar mysql
Pointcard_slave.tar.gz
Charge_alert checklog.tar etl_daily MysqlAlert. class
Temp
Charge_alert.tar checklog.tar.gz etl_daily.tar mysql_db.tar
Ttt.txt
Charge_stat_for_yuhui cron_mysql ftptst. ctl mysql-standard-5.0.27-linux-i686-glibc2
3 typescript
Charge_stat_for_yuhui.tar dbalert ip.txt nohup. out
[Mysql @ bj122 mysql] $ w
17:34:09 up, 5 users, load average: 0.01, 0.02, 0.00
User tty from login @ IDLE JCPU PCPU WHAT
Search pts/0 203.86.63.98 am 0.41 s 0.04 s-bash
Zxzhai pts/2 203.86.63.98 am 0.00 s 0.42 s 0.11 s-bash
Zxzhai pts/3 203.86.63.98 am 1: 58 m 0.15 s 0.03 s ssh-p7522 192.168.160.32-lzzx
Search pts/4 203.86.63.98 am 3: 03 m 0.12 s 0.03 s-bash
Search pts/5 203.86.63.98 pm 3: 19 m 0.20 s 0.04 s-bash
[Mysql @ bj122 mysql] $ exit
Exit

Script done on Wed Jul 2 17:34:13 2008