2. 瀹氭湡鍦╯lave涓婁嬌鐢╯hell,mysqldump,sftp,crontab榪涜姘鎬箙澶囦喚
#!/bin/sh
export d=`date +%Y%m%d%H%M%S`
mkdir -p /data/dbbak/baktables/$d
for i in `echo "show tables" | mysql -u bak -ppassword db|grep -v Tables`;
do
echo $i; mysqldump --add-drop-table --allow-keywords -q -a -c -u bak -ppasswod mbook_hd $i > backup/$d/$i.sql
done
tar czf backup/$d.tar.gz backup/$d/
rm -rf backup/$d/
lftp -e "cd /dbbak/; mput -c $d.tar.gz; quit" -u bak,password sftp://192.168.0.138
鍙傝僪ttp://ocaoimh.ie/simple-mysql-backup/export d=`date +%Y%m%d%H%M%S`
mkdir -p /data/dbbak/baktables/$d
for i in `echo "show tables" | mysql -u bak -ppassword db|grep -v Tables`;
do
echo $i; mysqldump --add-drop-table --allow-keywords -q -a -c -u bak -ppasswod mbook_hd $i > backup/$d/$i.sql
done
tar czf backup/$d.tar.gz backup/$d/
rm -rf backup/$d/
lftp -e "cd /dbbak/; mput -c $d.tar.gz; quit" -u bak,password sftp://192.168.0.138
10G綰у埆鐨勫彲浠ユ瘡澶╀綔涓嬈″浠斤紝100G綰у埆鐪嬪甫瀹藉拰紜洏錛孴綰ф病鏈夌粡楠?br />
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import string, os, sys
dir = '/home/waterye/works/'
files = os.listdir(dir)
for f in files:
if not os.path.isfile(dir+os.sep+f): continue
linecount = 0
fp = open(dir+os.sep+f,'r')
for line in fp:
linecount += 1
fp = open(dir+os.sep+f,'r')
for i,line in enumerate(fp):
if (i==linecount-1 and line.endswith('\n')):
print f
print "--------------------------------"
* bash澶毦鐞嗚В錛岃繕鏄敤py鐪嬩笂鍘昏垝鏈嶏紝铏界劧涓嶄笓涓氾紝浣嗚兘瀹屾垚浠誨姟灝辮
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use DateTime;
use Time::HiRes qw(time);
my $dt = DateTime->from_epoch( epoch => time() );
print $dt->strftime('%Y-%m-%d %H-%M-%S-%3N'), "\n";
* sudo apt-get install libdatetime-perl
perl鐪熼夯鐑?br />
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a. 浣跨敤whalin鐗堜細瀵艱嚧File Descriptor leak,鑰屼嬌鐢╯py鐗堝垯涓嶄細錛屽師鍥犳槸whalin鐗堟病鏈変嬌鐢╯elector綆＄悊socketchannel.
Thread.sleep(1000 * 30);
System.out.println("begin
");
Selector selector = null;
SocketChannel channel = null;
try {
String host = "192.168.0.74";
int port = 11211;
int timeout = 1000 * 60;
selector = Selector.open();
channel = SocketChannel.open();
channel.configureBlocking(false);
channel.connect(new InetSocketAddress(host, port));
channel.register(selector, channel.validOps());
try {
selector.select();
} catch (IOException e) {
e.printStackTrace();
}
Iterator it = selector.selectedKeys().iterator();
int i = 0;
while (it.hasNext()) {
i++;
System.out.println(i);
SelectionKey selKey = (SelectionKey) it.next();
it.remove();
try {
processSelectionKey(selKey);
} catch (IOException e) {
e.printStackTrace();
selKey.cancel();
}
}
System.out.println("unclose");
Thread.sleep(1000 * 30);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (channel != null && channel.isOpen()) {
try {
channel.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (selector!=null) {
selector.close(); // not fd leak
}
}
System.out.println("end");
Thread.sleep(1000 * 30 * 1);
閫氳繃lsof -p pid | grep pipe鍙互瑙傚療鏄惁鏈塮d leak.System.out.println("begin
");Selector selector = null;
SocketChannel channel = null;
try {
String host = "192.168.0.74";
int port = 11211;
int timeout = 1000 * 60;
selector = Selector.open();
channel = SocketChannel.open();
channel.configureBlocking(false);
channel.connect(new InetSocketAddress(host, port));
channel.register(selector, channel.validOps());
try {
selector.select();
} catch (IOException e) {
e.printStackTrace();
}
Iterator it = selector.selectedKeys().iterator();
int i = 0;
while (it.hasNext()) {
i++;
System.out.println(i);
SelectionKey selKey = (SelectionKey) it.next();
it.remove();
try {
processSelectionKey(selKey);
} catch (IOException e) {
e.printStackTrace();
selKey.cancel();
}
}
System.out.println("unclose
");Thread.sleep(1000 * 30);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (channel != null && channel.isOpen()) {
try {
channel.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (selector!=null) {
selector.close(); // not fd leak
}
}
System.out.println("end
");Thread.sleep(1000 * 30 * 1);
b. w鐗坰et 1000000 object 闇瑕?00s宸﹀彸錛宻鐗堝彧闇150s宸﹀彸
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]]>
sudo iftop -i ppp0
2. slurm
sudo apt-get install slurm
slurm -i ppp0
3. vnstat
sudo apt-get install vnstat
sudo chmod o+x /usr/bin/vnstat
sudo chmod o+wx /var/lib/vnstat/
vnstat -u -i ppp0
vnstat -i ppp0
vnstat -l -i ppp0
鍥犱負涓嶆槸server灝辨病鏈夌敤澶嶆潅鐨刴rtg
]]>
#!/usr/bin/env python
import sys
oldfile=sys.argv[1]
newfile=sys.argv[2]
print oldfile,newfile,
print
linecount = 0
str = ''
f = open(oldfile,'r')
for line in f:
linecount += 1
f = open(oldfile,'r')
for i,line in enumerate(f):
if (i==linecount-1):
str += line.replace('\n','')
# print line.replace('\n','')
else:
str += line
# print line,
#print len(str),str
f2 = open(newfile, 'w')
f2.write(str)
quit()
import sys
oldfile=sys.argv[1]
newfile=sys.argv[2]
print oldfile,newfile,
linecount = 0
str = ''
f = open(oldfile,'r')
for line in f:
linecount += 1
f = open(oldfile,'r')
for i,line in enumerate(f):
if (i==linecount-1):
str += line.replace('\n','')
# print line.replace('\n','')
else:
str += line
# print line,
#print len(str),str
f2 = open(newfile, 'w')
f2.write(str)
quit()
]]>
cat /proc/meminfo
dmesg |grep [mM][eE][mM]
cat /proc/pid/status
]]>
2. nice -n 19 rm -rf directory
3. ls | xargs rm
4. find . -mtime +90 -type f -exec rm -v {} \;
閲囩敤絎洓縐嶆渶濂斤紝鎶婁竴浜涙棫鐨勬枃浠跺厛鍒犻櫎
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