WCF的优势和性能测试

1, linux chkconfig command description:
this command use to update(add or delete) and search system running level info
usage: chkconfig [--add][--del][--list] system service
chkconfig [--level <level number>] system service [on/off/reset]level number:0,shutdown server1,simple user mode2,multi-user mode without netowrk connection 3,multi-user mode with netowrk connection 4,unavailable5,multi-user mode with graphical interfaces6, rebootexamples:
[root@localhost james]# chkconfig --list |head -5 ## list all system services NetworkManager 0:off 1:off 2:on 3:on 4:on 5:on 6:offacpid 0:off 1:off 2:on 3:on 4:on 5:on 6:offatd 0:off 1:off 2:off 3:on 4:on 5:on 6:offauditd 0:off 1:off 2:on 3:on 4:on 5:on 6:offautofs 0:off 1:off 2:off 3:on 4:on 5:on 6:off[root@localhost james]# chkconfig --list | grep mysqld ## check mysqld service from all system servicesmysqld 0:off 1:off 2:off 3:on 4:on 5:on 6:off[root@localhost james]# chkconfig --del mysqld ## delete mysqld service [root@localhost james]# chkconfig --list | grep mysql [root@localhost james]# chkconfig --add mysqld ## add mysqld service [root@localhost james]# chkconfig --list | grep mysqlmysqld 0:off 1:off 2:off 3:off 4:off 5:off 6:off ## here find all level down ,[root@localhost james]# chkconfig --level 345 mysqld on ## so can up level 3 4 5 [root@localhost james]# chkconfig --list | grep mysql mysqld 0:off 1:off 2:off 3:on 4:on 5:on 6:off[root@localhost james]# chkconfig --list mysqld ## list mysqld service mysqld 0:off 1:off 2:off 3:on 4:on 5:on 6:off[root@localhost james]# chkconfig mysqld on ## default up service to 2345 [root@localhost james]# chkconfig --list mysqldmysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off[root@localhost james]# refer to /article/4933059.html2,linux umask command file privileges :
[root@TKE/DEVEL_NEW tmp]# ls -lart vfm.txt -rw-r--r-- 1 apache apache 4 Jan 10 13:00 vfm.txt - rw- r-- r-- [+] apache apache 4 Jan 10 13:00 vfm.txttype owner access group access others access ACL access owner group file date file-nametype:usually : '-' refer to normal file 'd' refer to directory'l' refer to soft symbole file owner/group/others : '---' refer to r(read)/w(write)/x(execute) or 421if you want to change file/directory privileges ,you can use chmodchmod 775 vfm.txtchmod (a/u/g/o)(+/-/=)(rwx) filee.g.chown u+x vfm.txt
chown 755 vfm.txtchmod u=rwx,g=rx,o=x vfm.txt chmod =r vfm.txt ## a is default ,refer to all user chmod 444 vfm.txt ## equal to above one chmod a-w,a+r vfm.txt ##equal to above if you want to change file/directory owner/group ,you can use chownchown owner:group file/directory ## change owner and group at the same time chown owner: file/directory ## change owner and group to the same "owner"chown :group file/directory ## only change group or you can use chgrp ,just change group chgrp group file/directory
examples :[root@localhost james]# lldrwxr-xr-x. 2 root root 4096 Jan 10 16:58 tmp1[root@localhost james]# chown james: tmp1[root@localhost james]# lldrwxr-xr-x. 2 james james 4096 Jan 10 16:58 tmp1
[root@localhost james]# chown :root tmp1[root@localhost james]# lldrwxr-xr-x. 2 james root 4096 Jan 10 16:58 tmp1[root@localhost james]# chown eagle:colin tmp1[root@localhost james]# lldrwxr-xr-x. 2 eagle colin 4096 Jan 10 16:58 tmp1[root@localhost james]# chgrp james tmp1[root@localhost james]# lldrwxr-xr-x. 2 eagle james 4096 Jan 10 16:58 tmp1

default umask is 022
[root@localhost james]# pwd/tmp/james[root@localhost james]# umask0022[root@localhost james]# mkdir tmp1
[root@localhost james]# touch tmp2.txt[root@localhost james]# ls -lrttotal 4drwxr-xr-x. 2 root root 4096 Jan 10 16:58 tmp1-rw-r--r--. 1 root root 0 Jan 10 16:59 tmp2.txtso folder privilege is 777-022=755 file privilege is 666-022=644modify umask value [root@localhost james]# umask 0002[root@localhost james]# umask0002[root@localhost james]# mkdir tmp3[root@localhost james]# touch tmp4.txt[root@localhost james]# ls -lrttotal 8drwxr-xr-x. 2 root root 4096 Jan 10 16:58 tmp1-rw-r--r--. 1 root root 0 Jan 10 16:59 tmp2.txtdrwxrwxr-x. 2 root root 4096 Jan 10 17:01 tmp3-rw-rw-r--. 1 root root 0 Jan 10 17:01 tmp4.txt[root@localhost james]# so now folder privilege is 777-002=775file privilege is 666-004=664change like this only exist in current seesion ,so now open another session to check umask values [root@localhost ~]# umask0022[root@localhost ~]# if you want to set it permanently ,you can write this value to
/etc/profile~/.profile~/.bash_profileso after restart server or open another session ,the umask value is the one you modify session one :(/etc/profile)if [ $UID -gt 199 ] && [ "`id -gn`" = "`id -un`" ]; then umask 002else umask 002 (022 to 002)fisession two:[root@localhost ~]# umask0002[root@localhost ~]#

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