linux维护常用命令

du -sm /tmp/* | sort -nr

ssh连接被远程关闭解决方案

This works for me:
# cd ~/.ssh
# ssh-keygen -t rsa -f id_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in id_rsa.
Your public key has been saved in id_rsa.pub.
The key fingerprint is:
xx:xx:xx:08:d1:d1:29:da:29:8b:8f:c3:de:xx:xx:xx user@system
Log in as the intended user on the target machine. Add the public key
(id_rsa.pub) to ~/.ssh/authorized_keys. The file should look something
like this.
ssh-rsa
AAAAB3NzaC1yc2EAAAABIwAAAIEAtfjDtf/xhw2trKYAJ61MmzADkG+0ma7DrvIqjoRUswfPglRWrbDpD+An
A72dzJB8UcLCMB0jyEhNz3yN/tH8FQ4JAHQDDWyt47wAqf1PZGxxsXxxxxxxxxxxkx1ke4PM17rH5IK7uxJ5AnOU8jCJvXUxbdaYdReWnBSpInJHotE=
root@system
Note that this is all on one line. If you accidentally split it over
multiple lines, you'll get something like this:
# scp file user@system:/tmp
Connection closed by 10.10.16.10
lost connection
On system, you'll see something like the error below in /var/adm/messages
Jul  7 11:48:18 system sshd[26022]: [ID 800047 auth.crit] fatal:
buffer_get: trying to get more bytes 129 than in buffer 34

top vi command

http://www.oualline.com/vim/10/top_10.html

比较有用的
split - 分割多窗口

v - 可视化模式

> - 右缩进

ctrl-q - 进入列模式

cindent - 自动用c的缩进

make - 执行make，按:cn跳到下一个错误，:cc查看当前错误

ctags - 生成索引文件（支持多种编程语言）, vim -t a_function，直接打开a_function的定义文件，并跳到定义处。ctrl-]可以跳到函数定义,ctrl=T跳回调用处。

ab - 定义缩写宏，vi会自动替换

智能补齐，ctrl+p, ctrl+n

复合搜索，/;/分割，/{file}+1/;/echo/

重放搜索， :%s/^\(Martin\)/Mr \1 Wicks/g

切换大小写, Escape [n] ~

截取特定行另存，:6,9w >> /tmp/newfile

标记行光标移到该行上，键入mx（x 是任何一个小写字母）就可以了。`x可以跳到指定标记处。··跳到上一个标记处。


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