2015-04-20linux System daily Management 3

1. Linux system service Management
Tool NTSYSV similar to the graphical interface management tool, if no command is installed using Yum install-y NTSYSV
Common services: Crond, iptables, Network, sshd, Syslog, Irqbalance, SendMail, Microcode_ctl
Added Linux new service to boot boot

such as Tomcat

Vim/etc/init.d/tomcat//Join from second line

2. # chkconfig:2345 63 37

chmod 755/etc/init.d/tomcat

Chkconfig--add Tomcat
Chkconfig Tomcat on

2. Linux system logs
/etc/rsyslog.conf (http://www.lishiming.net/thread-7260-1-1.html)
/var/log/messages Core System log files
Archive one log per week messages-20130901
/etc/logrotate.conf
Messages is generated by the syslogd daemon, and if this service is stopped, the system will not generate/var/log/messages
Last/var/log/wtmp View User Login History
Lastb/var/log/btmp Viewing Invalid login history
/var/log/maillog Mail
/var/log/secure Login
/VAR/LOG/DMESG start
3. Exec and Xargs

Generate a. bak file

[email protected] sundong]# find/sd/sundong/-type f-mtime +1-exec cp {} {}.bak \;

Delete

[email protected] sundong]# find/sd/sundong/-type f-name "*.bak" |xargs RM-RF

Both exec and find use
Find files with the current directory creation time greater than 10 days and delete: Find. -mtime +10-exec rm-rf {} \;
Bulk Change file name: Find./*-exec mv {} {}_bak \;
Xargs used behind the pipe symbol
Find. -mtime +10 |xargs RM-RF
ls-d./* |xargs-n1-i{} MV {} {}_bak
Xargs can turn multiple lines into a row of cat 1.txt|xargs
4. Screen Tool Introduction
Screen is the equivalent of a virtual terminal, which does not exit due to network interruption, each login can enter the screen
How to use: Directly enter the screen command
Screen-ls View the screen that is already open
Ctrl +a then press D to exit the screen session, just exit, and not end. End words Enter Ctrl +d or enter exit
After exiting, you also want to log in to a screen session again, using Sreen-r Screenid if there is only one screen direct screen-r
Screen-s aming; login words screen-r aming
5. Learn to use the Curl command
Curl is a tool for simple testing of Web Access under the Linux system command line, with a few common options you need to master
Curl Baidu.com

All I know about curl

Http://www.apelearn.com/bbs/forum.php?mod=viewthread&tid=7427&highlight=curl

6. Several network-related commands
PING specifies the source IP

Ping-i 116.211.95.148 58.53.94.11
Telnet Www.lishiming.net 80
Traceroute www.baidu.com
Dig @8.8.8.8 study.lishiming.net

yum install bind-utils

NC arbitrary TCP and UDP connection and monitoring
SS command Usage (similar to netstat) http://www.ttlsa.com/linux-command/ss-replace-netstat/
Expand your Learning Profile:
1. XINETD (the default machine does not install this service, requires Yum install xinetd installation) http://blog.sina.com.cn/s/blog_465bbe6b010000vi.html

Linux xinetd Service Introduction (GO) http://blog.sina.com.cn/s/blog_6ceed3280101jja0.html

2. Linux System log Special Http://tech.ccidnet.com/pub/imag ... uanti/log/index.htm
3. Xargs command http://blog.csdn.net/zhangfn2011/article/details/6776925

2015-04-20linux System daily Management 3