发现这个功能非常有用，必须收藏起来。
grep -rnw ‘/path/to/somewhere/’ -e ‘pattern’
或者
grep -Ril “text-to-find-here” /
i stands for ignore case (optional in your case).R stands for recursive.l stands for “show the file name, not the result itself”./ stands for starting at the root of your machine.今天在研究Linux下增量备份的时候，发现了一个非常Genius的命令。
用这个命令即可以做到增量备份，又可以最少量的占用硬盘空间。
rm -rf backup.3
mv backup.2 backup.3
mv backup.1 backup.2
cp -al backup.0 backup.1
rsync -a --delete source_directory/ backup.0/
多的懒得写了，大家自己体会吧。:D
Refer：http://www.admin-magazine.com/Articles/Using-rsync-for-Backups/
Here are steps to setup a user and allow the user access only via FTP (i.e. no SSH) and also limit access to a specific (user home) directory on proftpd:
1. Add new user: adduser newusername
2. Set password: passwd newusername
3. Modify user home directory from default to a new folder:
usermod -d /target/directory username
4. Edit shells file: vi /etc/shells and add /dev/null at the end
5. Modify newusername entry in the passwd file: vi /etc/passwd to add /./ before the newusername so that the entry looks like this:
newusername:x:502:502::/home/ftp/./newusernamehomedirectory/:/dev/null
6. Edit /etc/proftpd/proftpd.conf file and uncomment the line DefaultRoot ~
grep -rnw '/path/to/somewhere/' -e 'pattern'-r or -R is recursive,-n is line number, and-w stands for match the whole word.-l (lower-case L) can be added to just give the file name of matching files.Along with these, --exclude, --include, --exclude-dir flags could be used for efficient searching:
grep --include=\*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"
grep --exclude=*.o -rnw '/path/to/somewhere/' -e "pattern"
--exclude-dirparameter. For example, this will exclude the dirs dir1/, dir2/ and all of them matching *.dst/:
grep --exclude-dir={dir1,dir2,*.dst} -rnw '/path/to/somewhere/' -e "pattern"
This works very well for me, to achieve almost the same purpose like yours.
For more options check man grep
1、查看系统
[root@localhost ~]# cat /etc/issue CentOS release 6.6 (Final) [root@localhost ~]# uname -a Linux localhost.localdomain 2.6.32-042stab106.6 #1 SMP Mon Apr 20 14:48:47 MSK 2015 x86_64 x86_64 x86_64 GNU/Linux
2、安装ShadowSocks
# yum install python-setuptools && easy_install pip
# pip install shadowsocks
3、创建配置文件/etc/shadowsocks.json
[root@localhost /]# touch /etc/shadowsocks.json
[root@localhost /]# vi /etc/shadowsocks.json
{
"server":"138.128.208.158",
"server_port":443,
"local_address": "127.0.0.1",
"local_port":1080,
"password":"MyPass",
"timeout":300,
"method":"rc4-md5"
}
备注：加密方式官方默认使用aes-256-cfb，推荐使用rc4-md5，因为 RC4比AES速度快好几倍。继续阅读
netstat -lntu
as replied by @askmish will give you list of services running on your system on tcp and udp ports where
You don’t need the ‘p’ parameter as you’re only interested in getting which ports are free and not which program is running on it.
This only shows which ports on your system are used up, though. This doesn’t tell you the status of your network e.g. if you’re behind NAT and you want some services to be accessible from outside. Or if the firewall is blocking the port for outside visitors. In that case, nmap comes to the rescue. WARNING: Use nmap only on networks which are under your control. Also, there are firewall rules which can block nmap pings, you’ll have to fiddle around with options to get correct results.
2016.09.27 更新
netstat -peanut 用这个参数更可以列出是哪个程序在占用哪个端口
netstat -ano 可以直接列出PID，然后到任务管理器里面可以根据PID查看是哪个程序。
如下命令
grep -rnw '/path/to/somewhere/' -e "pattern"
-r 或者 -R 为递归查找, -n 是行号 -w 为要求全匹配. -l (小写L) 参数可以只列出文件名.
除此以外, –exclude 或者 –include 参数可以提供更有效的查找。比如:
grep --include=\*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"
这个可以查找扩展名为.c或者.h的文件. –exclude的用法也类似：
grep --exclude=*.o -rnw '/path/to/somewhere/' -e "pattern"
上面这行命令在搜索中会排除扩展名为.0的文件。和包含/不包含文件一样，目录也可以使用 –exclude-dir 和 –include-dir 参数。 比如下面列出怎么使用 –exclude-dir:
grep --exclude-dir={dir1,dir2,*.dst} -rnw '/path/to/somewhere/' -e "pattern"
如果单是遍历查找文件的话可以用
find . -name '*.xml'
如果想遍历删除某种类型的文件的话，可以用
find . -name '*.xml' -type f -delete
在Ubuntu中是没有chkconfig这个命令的，如果想要在Ubuntu里面使用类似Chkconfig的命令怎么办呢？
可以试试sysv-rc-conf命令，如果没有安装的话，可以使用apt-get install来安装这个命令。就可以以模拟图形界面的方式来配置各个service的runlevel了。
另外Ubuntu使用Upstart来替代来了传统的sysvinit，详细的使用方法参加：
https://help.ubuntu.com/community/UpstartHowto
First verify that Tomcat is running on port 8080. Run the following command
# netstat -ntl
The output will look something like
Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 ::ffff:127.0.0.1:8005 :::* LISTEN tcp 0 0 :::8009 :::* LISTEN tcp 0 0 :::8080 :::* LISTEN tcp 0 0 :::22 :::* LISTEN
Run the following command to redirect port 80 traffic to port 8080
# iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
Run the folloing command to verify that redirect is working fine
# iptables -t nat -L
The output will look something like
Chain PREROUTING (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere anywhere tcp dpt:http redir ports 8080 Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination
Run the following command to remove the routing
# iptables -t nat -D PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
FROM: Glass Onion Blog
Today in this article we are going to discuss about some tools and commands that might answer your questions like name of your motherboard’s chipset, NIC type, etc. Some of the tools are in built into any Linux system and others need to be downloaded.
This standard Linux utility shows what your systems have got internally. The command is combination of ls, the standard command to list files and PCI that is for the peripheral connection. You can also expect your results to include AGP and onboard components like your USB chipset.
The command is much helpful in diagnosing bugs related to PCI devices.Using -t option of lspci command you can see PCI layout in a tree format.继续阅读