ubuntu14.04lts /var/log目录下生成的kern.log syslog有几十上百g

Posted 2023-05-08

参考技术A 一、/var目录
/var
所有服务的登录的文件或错误信息文件（LOG
FILES)都在/var/log下，此外，一些数据库如mysql则在/var/lib下，还有，用户未读的邮件的默认存放地点为/var/spool/mail
二、:/var/log/
系统的引导日志:/var/log/boot.log
例如:Feb
26
10:40:48
sendmial
:
sendmail
startup
succeeded
就是邮件服务启动成功!
系统日志一般都存在/var/log下
常用的系统日志如下:
核心启动日志:/var/log/dmesg
系统报错日志:/var/log/messages
邮件系统日志:/var/log/maillog
FTP系统日志:/var/log/xferlog
安全信息和系统登录与网络连接的信息:/var/log/secure
登录记录:/var/log/wtmp
记录登录者讯录，二进制文件，须用last来读取内容
who
-u
/var/log/wtmp
查看信息
News日志:/var/log/spooler
RPM软件包:/var/log/rpmpkgs
XFree86日志:/var/log/XFree86.0.log
引导日志:/var/log/boot.log
记录开机启动讯息，dmesg
|
more
cron(定制任务日志)日志:/var/log/cron
安全信息和系统登录与网络连接的信息:/var/log/secure
文件
/var/run/utmp
记录著现在登入的用户。
文件
/var/log/wtmp
记录所有的登入和登出。
文件
/var/log/lastlog
记录每个用户最後的登入信息。
文件
/var/log/btmp
记录错误的登入尝试。
less
/var/log/auth.log
需要身份确认的操作

text 如何在Ubuntu LTS上安装最新的gcc（12.04,14.04,16.04）

These commands are based on a askubuntu answer http://askubuntu.com/a/581497
To install gcc-6 (gcc-6.1.1), I had to do more stuff as shown below.
USE THOSE COMMANDS AT YOUR OWN RISK. I SHALL NOT BE RESPONSIBLE FOR ANYTHING.
ABSOLUTELY NO WARRANTY.

If you are still reading let's carry on with the code.

sudo apt-get update && \
sudo apt-get install build-essential software-properties-common -y && \
sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \
sudo apt-get update && \
sudo apt-get install gcc-snapshot -y && \
sudo apt-get update && \
sudo apt-get install gcc-6 g++-6 -y && \
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-6 && \
sudo apt-get install gcc-4.8 g++-4.8 -y && \
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.8;

When completed, you must change to the gcc you want to work with by default. Type in your terminal:
sudo update-alternatives --config gcc

To verify if it worked. Just type in your terminal
gcc -v

If everything went fine you should see gcc 6.1.1  by the time I am writing this gist

Happy coding!

See my blog post at https://www.application2000.com