UNIX系统怎么用，常用的命令有哪些

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UNIX/Linux 常用命令参考2009-11-12 13:00findall the files under /etc directory with mail in the filename.
# find /etc -name "*mail*"
all the files in the system greater than 100MB.
# find / -type f -size +100M
all the files that were modified more than 60 days ago under the current directory.
# find . -mtime +60
delete all the archive files with extension *.tar.gz and greater than 100M
# find / -type f -name *.tar.gz -size +100M -exec rm -f {} \;
archive all the files that are not modified in the last 60 days
# find /home/jsmith -type f -mtime +60 | xargs tar -cvf /tmp/`date '+%d%m%Y'_archive.tar`

xargs# find ~ -name ‘*.log’ -print0 | xargs -0 rm -f
If you have a file with list of URLs that you would like to download, you can use xargs as shown below.
# cat url-list.txt | xargs wget –cdate格式化$ date
Thu Jan 1 08:19:23 PST 2009
$ date +"%d-%m-%Y"
01-01-2009
$ date +"%d/%m/%Y"
01/01/2009
# date -s 07/20/2009
# date -s 09:20:00

crontab设置计划任务cronjobcrontab -l 查看
crontab -e 编辑

grep (-i ignore case)# grep -i john /etc/passwd
jsmith:x:1082:1082:John Smith:/home/jsmith:/bin/bash
jdoe:x:1083:1083:John Doe:/home/jdoe:/bin/bash

cutDisplay 1st and 3rd field from a colon delimited file
$ cut -d: -f 1,3 names.txt
Emma Thomas:Marketing
Alex Jason:Sales

Display only the first 8 characters of every line in a file
$ cut -c 1-8 names.txt
Emma Tho

系统服务管理# export LANG='en_US'
# setup 进入system service 选项

# chkconfig --level 2345 vsftpd on 开机自动启动服务
# /sbin/service start
# /etc/rc.d/init.d/ {start|stop|restart|condrestart|status}Change system booting level.Edit /etc/inittab file# vi /etc/inittab

# Default runlevel. The runlevels used by RHS are:
# 0 - halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, if you do not have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 - X11
# 6 - reboot (Do NOT set initdefault to this)
#
id:3:initdefault: <<----- edit this line

更改主机名第一步：
#hostname oratest
第二步：
修改/etc/sysconfig/network中的hostname
第三步：
修改/etc/hosts文件Linux下使用命令行安装VMware Tools1. 选择VM->Install VMware Tools
2. 以root用户装载VMware Tools虚拟光驱镜像并安装
　# mount /dev/cdrom /mnt
　# rpm -Uvh /mnt/VMwareTools-3.5.0-64607.i386.rpm
　# umount /mnt
3. 配置VMware Tools
　# vmware-config-tools.pl

UNIX没有速成。我用了6年了，仍感觉在技术上，上不去。

学习了。。。。