linux小命令
本文主要记录了我在工作中用到的一些linux命令
1、查询linux系统是32位还是64位
zhaolei@zhaolei :~# file /usr/bin/whoami
/usr/bin/whoami: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, stripped
2、自动登入SSH
zhaolei@zhaolei:~$ ssh-keygen -t rsa
zhaolei@zhaolei:~$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.1.100
zhaolei@zhaolei:~$ ssh root@192.168.1.100
3、修改用户登入名
zhaolei@zhaolei:~$ sudo usermod -l flyingzl zhaolei
下次登入后，zhaolei就无法登入了，改用flyingzl登入，登入后的命令行效果如下：
代码
flyingzl@zhaolei:~$ finger flyingzl
Login: flyingzl Name: zhaolei-linux
Directory: /home/zhaolei-linux Shell: /bin/bash
On since Mon Nov 1516:21 (CST) on tty7 from :0
3 days 16 hours idle
On since Mon Nov 1516:21 (CST) on pts/0 from :0.0
No mail.
No Plan.
flyingzl@zhaolei:~$
4、MySQL编码修改
修改/etc/mysql/my.cnf文件，在[mysql]和[mysqld]下增加default-character-set utf8
5、任务计划
root@one-desktop:~# crontab -e
root@one-desktop:~# crontab -l
crontab -e 命令表示编辑任务计划，crontab -l 表示显示已有的任务计划，看截图：
解释一下，m表示minute，可选值为0～59；h表示hour，可选值为0～23；dom即Day Of Month,可选值为1～31；month表示月份，可选值为1～12；down即Day Of Week，表示星期几，可选值为0～6，0表示周日；command表示要执行的命令。
根据上面的解释，0 9 * * 1-5 就表示每周一～周五的9点执行命令。
6、提示 NO_PUBKEY 6AF0E1940624A220
输入命令 sudo gpg --keyserver keyserver.ubuntu.com --recv 0624A220 ，然后再sudo apt-get update即可
oot@ubuntu:~# gpg --keyserver keyserver.ubuntu.com --recv 0624A220
gpg: requesting key 0624A220 from hkp server keyserver.ubuntu.com
gpg: key 0624A220: "Launchpad PPA for TualatriX" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
root@ubuntu:~# apt-key list
/etc/apt/trusted.gpg
--------------------
pub 1024D/437D05B5 2004-09-12
uid Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
sub 2048g/791643872004-09-12
pub 1024D/FBB75451 2004-12-30
uid Ubuntu CD Image Automatic Signing Key <cdimage@ubuntu.com>
pub 1024R/0624A220 2009-01-19
uid Launchpad PPA for TualatriX
root@ubuntu:~#
7、访问windows共享文件夹
flyingzl@zhaolei:~$ smbclient //10.4.68.14/www -U zhaolei%password
Domain=[PLATFORM] OS=[Windows 7 Ultimate 7600] Server=[Windows 7 Ultimate 6.1]
smb: \> dir
. D 0 Tue Mar 909:49:042010
.. D 0 Tue Mar 909:49:042010
phpinfo.php A 65 Wed May 2708:48:562009
phpMyAdmin D 0 Tue Mar 909:49:042010
ext-3.1.1 D 0 Tue Feb 907:22:002010
two.html A 712 Thu May 2016:04:262010
dojo-release-1.5.0rc1 D 0 Fri Jun 1114:26:142010
飞秋.exe A 3305472 Sat Feb 2011:57:522010
django-docs D 0 Thu Jun 1717:14:302010
statusnet-0.9.3 D 0 Wed Jun 3003:09:482010
demo.php A 32 Thu Oct 2814:41:382010
hyk-proxy-install_0.9.0.exe A 2146018 Wed Oct 2020:36:282010
charts D 0 Wed Oct 2709:15:542010
demo1.php A 111 Thu Oct 2814:44:042010
HQ.SQL A 1947 Tue Nov 214:37:482010
ajaxplorer-core-3.1.0 D 0 Mon Nov 1518:46:142010
FusionWidgets_Developer D 0 Mon Jul 1910:30:322010
java-linux.bin A 83790617 Wed Nov 2418:23:082010
49558 blocks of size 524288. 19119 blocks available
smb: \>
也可以直接用命令 smbclient -c "dir" //10.4.68.14/www -U zhaolei%password
8、同步服务器时间
suo cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
#设置utc为no
sudo vim /etc/default/rcS
sudo ntpdate cn.pool.ntp.org
9、通过apt-get安装sun-jdk
在/etc/apt/sources.list中增加"deb http://archive.canonical.com/ lucid partner",然后apt-get update、apt-get install sun-java6-jdk即可
