https://docs.mongodb.org/manual/tutorial/install-mongodb-on-red-hat/
]]>
http://codingstandards.iteye.com/blog/1160298
]]>
Googled many pages, most of them introduced how to scan wifi links by command line tool "iw", i tried all steps supplied by the pages but was blocked at the last step to get dynamical ipaddress by dhclient command "sudo dhclient wlp3s0 -v". The dhclient always complain "NO DHCPOFFERS received." (I doubted there should be some tricky to play with dhclient but which i am not faimiar with.. sad.. )
But i think there would be some extending tool for NetworkManager to manager wifi, then i google "NetworkManager wifi", i got "NetwrokManager-wifi plugin" from link https://www.centos.org/forums/viewtopic.php?f=47&t=52810
After following steps , i finally make wifi work well on centos 7.1
- yum install NetworkManager-wifi
- reboot machine (i tried logout and login, not work)
Problem is NetworkManager-wifi is not installed by default on centos 7.1, (would it be my mistake when install OS? strange..)
]]>
One issue is:
uuid_gen_unix.c: In function 'axutil_uuid_gen_v1':uuid_gen_unix.c:62:20: error: variable 'tv' set but not used [-Werror=unused-but-set-variable] struct timeval tv; ^cc1: all warnings being treated as errors
Solution is remove "-Werror" in all configure scripts
find -type f -name configure -exec sed -i '/CFLAGS/s/-Werror//g' {} \;
/usr/bin/ld: test.o: undefined reference to symbol 'axiom_xml_reader_free'
/usr/local/axis2c/lib/libaxis2_parser.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[4]: *** [test] Error 1
make[4]: Leaving directory `/home/miaoyachun/softwares/test/axis2c-src-1.6.0/neethi/test'
/usr/local/axis2c/lib/libaxis2_parser.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[4]: *** [test] Error 1
make[4]: Leaving directory `/home/miaoyachun/softwares/test/axis2c-src-1.6.0/neethi/test'
As suggested in https://code.google.com/p/staff/issues/detail?id=198, the solution is disable neethi/test in following files:
- neethi/configure, remove all "test/Makefile"
- neethi/Makefile.am, update "SUBDIRS = src test" with "SUBDIRS = src"
- neethi/Makefile.in, update "SUBDIRS = src test" with "SUBDIRS = src"
Finally, you could run "make; sudo make install"" successfully. Last thing should be paid attention to is you may need copy all head files of neethi/include into /usr/local/axis2c/include/axis2-1.6.0/ which needed when you compile customized web service.
Enjoining it!!
]]>
]]>
arp_ignore - INTEGER
Define different modes for sending replies in response to
received ARP requests that resolve local target IP addresses:
0 - (default): reply for any local target IP address, configured
on any interface
1 - reply only if the target IP address is local address
configured on the incoming interface
2 - reply only if the target IP address is local address
configured on the incoming interface and both with the
sender's IP address are part from same subnet on this interface
3 - do not reply for local addresses configured with scope host,
only resolutions for global and link addresses are replied
4-7 - reserved
8 - do not reply for all local addresses
榛樿鏄?錛岃В鍐寵繖涓棶棰橀渶瑕侀厤緗負(fù)1Define different modes for sending replies in response to
received ARP requests that resolve local target IP addresses:
0 - (default): reply for any local target IP address, configured
on any interface
1 - reply only if the target IP address is local address
configured on the incoming interface
2 - reply only if the target IP address is local address
configured on the incoming interface and both with the
sender's IP address are part from same subnet on this interface
3 - do not reply for local addresses configured with scope host,
only resolutions for global and link addresses are replied
4-7 - reserved
8 - do not reply for all local addresses
涓存椂閰嶇疆涓?br />
sysctl -w net.ipv4.conf.all.arp_ignore=1
鎸佷箙閰嶇疆
sysctl -w net.ipv4.conf.all.arp_ignore=1
echo 'net.ipv4.conf.all.arp_ignore=1' >> /etc/sysctl.conf
echo 'net.ipv4.conf.all.arp_ignore=1' >> /etc/sysctl.conf
榪欎釜寮勫ソ鍙互閲嶅惎network鏈嶅姟鏉ョ‘淇濆叾浠栨満鍣ㄦ洿鏂癮rp cache錛屽鏋滀笉鏂逛究閲嶅惎network錛岃嚜宸辨墜鍔ㄦ暡arping鍛戒護(hù)錛屾瘮濡?br />
arping -q -A -c 1 -I eth1 10.197.24.177
榪欎釜鍛戒護(hù)鏄湪 /etc/sysconfig/network-scripts/ifup-eth閲岀湅鍒扮殑濡傛灉鏈哄櫒姣旇緝?yōu)畱锛屼篃鍙互鐩存帴鐢╝rp -d 鏉ュ垹闄ょ浉鍏崇殑cache錛屽緩璁笂闈㈢殑閭ｇ鍙戝箍鎾殑鏂瑰紡銆?img src ="http://www.tkk7.com/miaoyachun/aggbug/392078.html" width = "1" height = "1" />
]]>
smartctl -a /dev/sda
(smartctl宸ュ叿鏉ヨ嚜smartmontools, 鍙互apt-get install smartmontools鏉ュ畨瑁?媯(gè)嫻嬫墍鏈塺aid璁懼
mdadm -Ds
媯(gè)嫻嬪叿浣搑aid璁懼淇℃伅
mdadm -D /dev/md0
鍒涘緩raid璁懼
mdadm --create --verbose /dev/md0 --level=raid0 --raid-devices=8 /dev/sdd /dev/sdc /dev/sdf /dev/sde /dev/sdg /dev/sdh /dev/sdi /dev/sdj
鍋滄raid璁懼
mdadm -S /dev/md0
鏍煎紡鍖杛aid璁懼
mkfs -t xfs -f /dev/md0
鎸傝澆raid璁懼
mount -t xfs /dev/md0 /raid
鍒囨崲raid妯″紡鐨勬楠?br />
1. umount if mounted : umount /raid
2. stop raid device: mdadm -S /dev/md0
3. create raid: mdadm --create ...
4. update /etc/mdadm.conf with output of 'mdadm -Ds', 鐢ㄦ潵寮鏈鴻嚜鍔ㄧ粍raid
5. update /etc/fstab, 濡傛灉闇瑕佸紑鏈鴻嚜鍔╩ount
Ref:
2. stop raid device: mdadm -S /dev/md0
3. create raid: mdadm --create ...
4. update /etc/mdadm.conf with output of 'mdadm -Ds', 鐢ㄦ潵寮鏈鴻嚜鍔ㄧ粍raid
5. update /etc/fstab, 濡傛灉闇瑕佸紑鏈鴻嚜鍔╩ount
Ref:
http://francs3.blog.163.com/blog/static/40576727201212145744783/
http://hi.baidu.com/powersaven/item/1da2dc147a8be2e25f53b19e
]]>
alternatives --install /usr/bin/java java /opt/jdk1.5.0_22/bin/java 15000
alternatives --install /usr/bin/javac javac /opt/jdk1.5.0_22/bin/javac 15000
alternatives --config java
alternatives --config javac
鐢ㄦ硶榪樻槸涓鏍風(fēng)殑銆傘?br />
]]>
typedef struct Foo {
int len;
char name[100];
} Foo_t;
JNIEXPORT jint JNICALL
Java_TestJNI_foo(JNIEnv *env, jobject obj, jobject fooObj) {
Foo_t * bar = malloc(sizeof(Foo_t));
jclass clazz;
jfieldID fid;
//init the bar data of C
strcpy(bar->name, "Yachun Miao");
bar->len = strlen(bar->name);
// mapping bar of C to foo
clazz = (*env)->GetObjectClass(env, fooObj);
if (0 == clazz) {
printf("GetObjectClass returned 0\n");
return (-1);
}
fid = (*env)->GetFieldID(env, clazz, "len", "I");
(*env)->SetLongField(env, fooObj, fid, bar->len);
fid = (*env)->GetFieldID(env, clazz, "name", "Ljava/lang/String;");
jstring name = (*env)->NewStringUTF(env, bar->name);
(*env)->SetObjectField(env, fooObj, fid, name);
free(bar);
return 0;
}
int len;
char name[100];
} Foo_t;
JNIEXPORT jint JNICALL
Java_TestJNI_foo(JNIEnv *env, jobject obj, jobject fooObj) {
Foo_t * bar = malloc(sizeof(Foo_t));
jclass clazz;
jfieldID fid;
//init the bar data of C
strcpy(bar->name, "Yachun Miao");
bar->len = strlen(bar->name);
// mapping bar of C to foo
clazz = (*env)->GetObjectClass(env, fooObj);
if (0 == clazz) {
printf("GetObjectClass returned 0\n");
return (-1);
}
fid = (*env)->GetFieldID(env, clazz, "len", "I");
(*env)->SetLongField(env, fooObj, fid, bar->len);
fid = (*env)->GetFieldID(env, clazz, "name", "Ljava/lang/String;");
jstring name = (*env)->NewStringUTF(env, bar->name);
(*env)->SetObjectField(env, fooObj, fid, name);
free(bar);
return 0;
}
瀵瑰簲鐨凧ava璋冪敤
public class Foo {
protected int len;
protected String name;
}
private static native int foo(Foo fooObj);
public static void main(String args[]) {
System.loadLibrary("mylib");
Foo foo = new Foo();
foo(foo);
System.out.println(foo.name);
System.out.println(foo.len);
}
protected int len;
protected String name;
}
private static native int foo(Foo fooObj);
public static void main(String args[]) {
System.loadLibrary("mylib");
Foo foo = new Foo();
foo(foo);
System.out.println(foo.name);
System.out.println(foo.len);
}
鍙傝冮摼鎺?br />
http://www.steveolyo.com/JNI/JNI.html#CSTRCJ
http://docs.oracle.com/javase/6/docs/technotes/guides/jni/spec/types.html
]]>
騫蟲(chóng)椂瑕佺敤鎭跺績(jī)鐨刢itrix Xenapp & citrix receiver 宸ヤ綔鐜錛岃瀹屽悗鍙戠幇client绔笉鑳藉鍒跺唴瀹瑰埌server绔紝榪欐牱浼?xì)瀵瑰伐浣滈犳垚寰堝ぇ鐨勫洶鎵般?br />鍋剁劧鍙戠幇citrix receiver鐨勮繘紼嬩笂鏈変釜-file鐨勯夐」錛屼細(xì)鎸囧畾涓復(fù)鏃墮厤緗枃浠訛紝閲岄潰鎻愬強(qiáng)
浜庢槸grep涓嬭繖涓叧閿瓧錛屽彂鐜皛/ICAClient/linuxx86/config/All_Regions.ini 涔熸湁涓被浼肩殑ClipboardAllowed=off
ClipboardAllowed=*
鏀逛負(fù)ClipboardAllowed=true
鐒跺悗閲嶆柊寮Xenapp session涔嬪悗鍙戠幇宸茬粡鍙互榛忚創(chuàng)浜?jiǎn)銆?br />鎸夌収榪欎釜鎬濊礬錛屼嬌鐢╳indows鐨勫悓浜嬩嬌鐢ㄥ涓嬬殑鏂瑰紡鎵撻氫袱绔痗lipboard
1. 鎵撳紑緋葷粺娉ㄥ唽琛ㄧ紪杈戝櫒
2. 瀹氫綅HKEY_CURRENT_USER\Software\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Clipboard
3. 淇敼ClipboardAllowed涓?
4. 娉ㄩ攢褰撳墠鐢ㄦ埛錛堟垨璁?dāng)R渶瑕侊級(jí)
2. 瀹氫綅HKEY_CURRENT_USER\Software\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Clipboard
3. 淇敼ClipboardAllowed涓?
4. 娉ㄩ攢褰撳墠鐢ㄦ埛錛堟垨璁?dāng)R渶瑕侊級(jí)
濡傛灉Xenapp server涓婁嬌鐢╲nc viewer涔嬬被鐨刋client錛屽鏋滄兂鎵撻氬埌vnc server鐨刢lipboard錛岃繕闇瑕佸湪vnc server鎵鍦╨inux涓繪満寮鍚互涓嬭繘紼?br />
vncconfig -nowin &
榪欎釜鏈夌偣涓嶇悊瑙ｏ紝浣嗙‘瀹炲彲琛屻傚緟鐪熺浉銆傘?br />]]>
miaoyachun@ymiao:~$ /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon
^Z
[1]+ Stopped /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon
miaoyachun@ymiao:~$ bg
[1]+ /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon &
miaoyachun@ymiao:~$
^Z
[1]+ Stopped /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon
miaoyachun@ymiao:~$ bg
[1]+ /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon &
miaoyachun@ymiao:~$
]]>
緙栬緫浠ヤ笅鍐呭錛?br />
[Desktop Entry]
Version=14.0
Name=Mozilla Firefox Web Browser
Comment=Browse the World Wide Web
GenericName=Web Browser
Keywords=Internet;WWW;Browser;Web;Explorer
Exec=/opt/firefox/firefox %u
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=firefox
Categories=GNOME;GTK;Network;WebBrowser;
MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;x-scheme-handler/ftp;x-scheme-handler/chrome;video/webm;application/x-xpinstall;
StartupNotify=true
Actions=NewWindow;
鍒版枃浠秪/.local/share/applications/firefox.desktop, 騫朵繚瀛橀鍑恒?br />鎵ц錛?br />Version=14.0
Name=Mozilla Firefox Web Browser
Comment=Browse the World Wide Web
GenericName=Web Browser
Keywords=Internet;WWW;Browser;Web;Explorer
Exec=/opt/firefox/firefox %u
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=firefox
Categories=GNOME;GTK;Network;WebBrowser;
MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;x-scheme-handler/ftp;x-scheme-handler/chrome;video/webm;application/x-xpinstall;
StartupNotify=true
Actions=NewWindow;
update-desktop-database ~/.local/share/applications/
閰嶅ソ浠ュ悗"System Settings -> Detail -> Default Applications -> Web" list閲屽氨浼?xì)鏈塮irefox浜?jiǎn)銆?br />
Ref: http://askubuntu.com/questions/166455/how-do-i-make-luakit-my-default-browser
]]>
" set invpaste
]]>
ref: http://curl.haxx.se/docs/sslcerts.html
]]>
1. checkout memcached src code from git server
2. sh autogen.sh & ./configure
3. modify Makefile about CFLAGS, append option '-pg', after that do make
4. run memcached & do some actions by telnet
5. terminate memcached process, a gmon.out file will be generated.
6. gprof memcached gmon.out | /usr/bin/gprof2dot.py -n0 -e0 -c bw | dot -Tpng -o memcached_callgraph.png
]]>
The scriptlets also take an argument, passed into them by the controlling rpmbuild process. This argument, accessed via $1 is the number of packages of this name which will be left on the system when the action completes, except for %pretrans and %posttrans which are always run with $1 as 0 (%pretrans and %posttrans are available in rpm 4.4 and later). So for the common case of install, upgrade, and uninstall we have:
| | install | upgrade | uninstall |
| %pretrans | $1 == 0 | $1 == 0 | (N/A) |
| %pre | $1 == 1 | $1 == 2 | (N/A) |
| %post | $1 == 1 | $1 == 2 | (N/A) |
| %preun | (N/A) | $1 == 1 | $1 == 0 |
| %postun | (N/A) | $1 == 1 | $1 == 0 |
| %posttrans | $1 == 0 | $1 == 0 | (N/A) |
Scriptlets ordering
The scriptlets in %pre and %post are respectively run before and after a package is installed.
The scriptlets %preun and %postun are run before and after a package is uninstalled. The
scriptlets %pretrans and %posttrans are run at start and end of a transaction.
On upgrade, the scripts are run in the following order:
%pretrans of new package
%pre of new package
(package install)
%post of new package
%triggerin of other packages (set off by installing new package)
%triggerin of new package (if any are true)
%triggerun of old package (if it's set off by uninstalling the old package)
%triggerun of other packages (set off by uninstalling old package)
%preun of old package
(removal of old package)
%postun of old package
%triggerpostun of old package (if it's set off by uninstalling the old package)
%triggerpostun of other packages (if they're setu off by uninstalling the old package)
%posttrans of new package
The scriptlets %preun and %postun are run before and after a package is uninstalled. The
scriptlets %pretrans and %posttrans are run at start and end of a transaction.
On upgrade, the scripts are run in the following order:
%pretrans of new package
%pre of new package
(package install)
%post of new package
%triggerin of other packages (set off by installing new package)
%triggerin of new package (if any are true)
%triggerun of old package (if it's set off by uninstalling the old package)
%triggerun of other packages (set off by uninstalling old package)
%preun of old package
(removal of old package)
%postun of old package
%triggerpostun of old package (if it's set off by uninstalling the old package)
%triggerpostun of other packages (if they're setu off by uninstalling the old package)
%posttrans of new package
For detail, will ref:
http://fedoraproject.org/wiki/Packaging:ScriptletSnippets
]]>
2. 鍛戒護(hù)琛岄夐」
閫夐」-d 鐢ㄦ潵鎵撳紑debug妯″紡
閫夐」-v 鐢ㄦ潵鎵撳紑verbose妯″紡
閫夐」-f 鐢ㄦ潵鎵撳紑寮哄埗閫夐」錛屼細(xì)寮哄埗鍙戠敓log rotate鍗充嬌涓嶆弧瓚蟲(chóng)潯浠?br />
debug妯″紡璺焩erbose鐨勫尯鍒氨鏄? debug妯″紡鏄痙ry-run鐗堟湰鐨剉erbose妯″紡錛屼竴鑸敤鏉ヨ皟璇曟柊鍔犵殑logroate閰嶇疆鏂囦歡, 姣斿錛?br />
/usr/sbin/logrotate /etc/logrotate.d/NEWCONFIG -df
/usr/sbin/logrotate /etc/logrotate.d/NEWCONFIG -vf
]]>
perlvar鐢╬erldoc perlvar 鍙互緇撳悎瀹炰緥鏉ヤ簡(jiǎn)瑙ｆ洿璇︾粏鐨勪俊鎭?br />
涓嬮潰閽堝$@鍐欎簡(jiǎn)涓猵erl alarm鐨勪緥瀛?br />
#!/usr/bin/perl
my $timeout = 5;
$SIG{ALRM} = sub {
die "alarm\n";
};
eval {
alarm $timeout;
sleep(6);
alarm 0;
};
if ($@) {
print "timeout\n";
}
else {
print "not timeout\n";
}
my $timeout = 5;
$SIG{ALRM} = sub {
die "alarm\n";
};
eval {
alarm $timeout;
sleep(6);
alarm 0;
};
if ($@) {
print "timeout\n";
}
else {
print "not timeout\n";
}
]]>
create test file
touch file1 file2;
echo 1 > file1;
echo 2 > file2;
tar zvcf old.tar.gz file1 file2;
echo 1 > file1;
echo 2 > file2;
tar zvcf old.tar.gz file1 file2;
split file to segment with size as u wished
split -b 50 old.tar.gz;
restore file from segments
cat xa* > new.tar.gz;
verify the restore
md5sum old.tar.gz new.tar.gz
Generally, the check result should be same.
]]>
In many cases, binaries can no longer dump core after calling setuid().
Under Linux it is possible to re-enable this with a system call.
e.g.
+#ifdef __linux__
+#include <sys/prctl.h>
+#endif
+
#ifdef HAVE_purify
#define IF_PURIFY(A,B) (A)
#else
@@ -1362,6 +1366,10 @@
sql_perror("setuid");
unireg_abort(1);
}
+#ifdef __linux__
+ /* inform kernel that process is dumpable */
+ prctl(PR_SET_DUMPABLE,1,0,0,0);
+#endif /* __linux__ */
#endif
+#include <sys/prctl.h>
+#endif
+
#ifdef HAVE_purify
#define IF_PURIFY(A,B) (A)
#else
@@ -1362,6 +1366,10 @@
sql_perror("setuid");
unireg_abort(1);
}
+#ifdef __linux__
+ /* inform kernel that process is dumpable */
+ prctl(PR_SET_DUMPABLE,1,0,0,0);
+#endif /* __linux__ */
#endif
Manual of prctl
PR_SET_DUMPABLE
(Since Linux 2.4) Set the state of the flag determining whether core dumps are produced for this process upon delivery of a
signal whose default behaviour is to produce a core dump. (Normally this flag is set for a process by default, but it is
cleared when a set-user-ID or set-group-ID program is executed and also by various system calls that manipulate process UIDs
and GIDs). In kernels up to and including 2.6.12, arg2 must be either 0 (process is not dumpable) or 1 (process is dumpable).
Since kernel 2.6.13, the value 2 is also permitted; this causes any binary which normally would not be dumped to be dumped
readable by root only. (See also the description of /proc/sys/fs/suid_dumpable in proc(5).)
(Since Linux 2.4) Set the state of the flag determining whether core dumps are produced for this process upon delivery of a
signal whose default behaviour is to produce a core dump. (Normally this flag is set for a process by default, but it is
cleared when a set-user-ID or set-group-ID program is executed and also by various system calls that manipulate process UIDs
and GIDs). In kernels up to and including 2.6.12, arg2 must be either 0 (process is not dumpable) or 1 (process is dumpable).
Since kernel 2.6.13, the value 2 is also permitted; this causes any binary which normally would not be dumped to be dumped
readable by root only. (See also the description of /proc/sys/fs/suid_dumpable in proc(5).)
Ref: http://bugs.mysql.com/bug.php?id=21723
Some files about linux core dump:
/proc/sys/fs/suid_dumpable
/etc/profile
/etc/security/limits.conf
/proc/sys/kernel/core_pattern
/etc/profile
/etc/security/limits.conf
/proc/sys/kernel/core_pattern
]]>
[root@hengtiandesk118 .ssh]# ssh-copy-id -i id_rsa.pub 10.1.186.51
10
Warning: Permanently added '10.1.186.51' (RSA) to the list of known hosts.
root@10.1.186.51's password:
Now try logging into the machine, with "ssh '10.1.186.51'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[root@hengtiandesk118 .ssh]# ssh 10.1.186.51
Last login: Thu May 10 18:33:55 2012 from 10.5.4.201
[root@xen186v01 ~]#
10
Warning: Permanently added '10.1.186.51' (RSA) to the list of known hosts.
root@10.1.186.51's password:
Now try logging into the machine, with "ssh '10.1.186.51'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[root@hengtiandesk118 .ssh]# ssh 10.1.186.51
Last login: Thu May 10 18:33:55 2012 from 10.5.4.201
[root@xen186v01 ~]#
榪欎釜鑴氭湰鍙瑁呬簡(jiǎn)openssh-clients灝卞彲浠ョ敤浜?jiǎn)銆?br />
浠ュ墠閮芥槸鎵嬪姩澶嶅埗綺樿創(chuàng)鐨?..
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1. remote file copy
[root@xen74v01 ~]# cat test.pl
#!/usr/bin/perl
print "eth0.74"=~/(\w+)/;
print "\n";
[root@xen74v01 ~]# cat test.pl | ssh 10.1.74.76 'cat - > /tmp/test.pl'
#!/usr/bin/perl
print "eth0.74"=~/(\w+)/;
print "\n";
[root@xen74v01 ~]# cat test.pl | ssh 10.1.74.76 'cat - > /tmp/test.pl'
鎷瘋礉鏂囦歡鏃訛紝濡傛灉鏂囦歡寰堝ぇ錛屽張涓嶆兂褰卞搷緗戠粶IO鍙互鐢╬v宸ュ叿榪涜嫻侀噺鎺у埗
pv -L10m test.pl | ssh 10.1.74.76 'cat - > /tmp/test.pl'
榪欓噷pv鐨勮涓鴻窡cat姣旇緝綾諱技錛屼絾鏄敮鎸両O嫻侀噺鎺у埗錛岃繖閲岃緗?0M/s.2. local script remote execute
[root@xen74v01 ~]# cat test.pl
#!/usr/bin/perl
print "eth0.74"=~/(\w+)/;
print "\n";
[root@xen74v01 ~]# perl test.pl
eth0
[root@xen74v01 ~]# cat test.pl | ssh 10.1.74.76 'perl'
eth0
[root@xen74v01 ~]# ssh 10.1.74.76 'perl' < test.pl
eth0
#!/usr/bin/perl
print "eth0.74"=~/(\w+)/;
print "\n";
[root@xen74v01 ~]# perl test.pl
eth0
[root@xen74v01 ~]# cat test.pl | ssh 10.1.74.76 'perl'
eth0
[root@xen74v01 ~]# ssh 10.1.74.76 'perl' < test.pl
eth0
榪欐牱灝變笉鐢ㄦ妸鑴氭湰鎷瘋礉鍒拌繙绔幓鎵ц浜?br />
鍙傝冿細(xì)
http://linux.icydog.net/ssh/piping.php
http://www.ivarch.com/programs/quickref/pv.shtml
http://www.mysqlperformanceblog.com/2009/05/20/hint-throttling-xtrabackup/
]]>
http://net-snmp.sourceforge.net/wiki/index.php/Tutorials
2. Config & start agent
snmpconf
3. snmpwalk example
snmpwalk -v2c -c public 10.1.74.51
4. check MIB modules
snmptranslate -Dinit_mib .1.3 2>&1 |grep MIBDIR
5. extending MIB Module
http://net-snmp.sourceforge.net/wiki/index.php/TUT:Writing_a_MIB_Module
a. download net-snmp src code
b. MIB definition
c. mib2c (in net-snmp-perl)
d. make & make install
e. edit snmpd conf & restart agent
f. snmpwalk to verify
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http://www.iozone.org/
瀹夎
鍏堢‘淇漴pmforge repository婧愬凡緇忓畨瑁呫傚叿浣撳弬鑰冿細(xì)
http://www.tkk7.com/miaoyachun/archive/2012/02/03/369319.html
鐒跺悗鐩存帴yum瀹夎
yum install iozone
http://www.tkk7.com/miaoyachun/archive/2012/02/03/369319.html
鐒跺悗鐩存帴yum瀹夎
yum install iozone
嫻嬭瘯
iozone -i 0 -r 32 -s 2097152
Iozone: Performance Test of File I/O
Version $Revision: 3.394 $
Compiled for 64 bit mode.
Build: linux
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
Ben England.
Run began: Wed Apr 25 19:36:55 2012
Record Size 32 KB
File size set to 2097152 KB
Command line used: iozone -i 0 -r 32 -s 2097152
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
2097152 32 844758 2001670
iozone test complete.
Iozone: Performance Test of File I/O
Version $Revision: 3.394 $
Compiled for 64 bit mode.
Build: linux
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
Ben England.
Run began: Wed Apr 25 19:36:55 2012
Record Size 32 KB
File size set to 2097152 KB
Command line used: iozone -i 0 -r 32 -s 2097152
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
2097152 32 844758 2001670
iozone test complete.
]]>
瀹為獙浜?jiǎn)涓嬪Q屾槸鍙互鐨勩備笉榪囩敤鐨刴aven3
]]>
1. install vncserver
2. set password for login user
5. restart the server
6. access by vncviewer
Ref: VNC How TO
sudo yum install vnc-server
2. set password for login user
vncpasswd
3. start one server to generate setting file ~/.vnc/xstartupvncserver :1
4. edit ~/.vnc/xstartup as suggestion of comments to uncomment two lines: unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc
exec /etc/X11/xinit/xinitrc
5. restart the server
vncserver -kill :1
vncserver -geometry 1200x900 -depth 16 :1
瀹藉睆鐨勮瘽
vncserver -geometry 1200x900 -depth 16 :1
瀹藉睆鐨勮瘽
vncserver -geometry 1366x768 -depth 16 :1, 濡傛灉涓嶉『鐪?鍙互寰皟錛屾垜褰撳墠鐨勬渶浣?jīng)_垎杈ㄧ巼鏄?br />
vncserver -geometry 1346x680 -depth 16 :1
6. access by vncviewer
vncviewer SERVER_IP:5901
Ref: VNC How TO
]]>