openwares.net

#include <QApplication>
#include <QLabel>

int main(int argc, char** argv){
 QApplication app(argc, argv);

 QLabel lMsg("Hello QT5!");
 lMsg.show();

 return app.exec();
}

$ qmake -project
$ qmake 
$ make

hello.cpp:1:24: fatal error: QApplication: No such file or directory

QT += widgets

$ ./hello

# qt5.7
export QT_HOME=/opt/Qt/5.7/gcc_64
export PATH=$QT_HOME/bin:$PATH
export CPATH=$QT_HOME/include:$PATH
export LIBRARY_PATH=$QT_HOME/lib:$LIBRARY_PATH
export LD_LIBRARY_PATH=$QT_HOME/lib:$LD_LIBRARY_PATH

$ . .bashrc

/srv/homes 10.100.0.0/24(rw) 192.168.0.0/24(rw)

# showmount -e 10.100.0.30
Export list for 10.100.0.30:
/srv/homes 10.100.0.0/24

rpc mount export: RPC: Authentication error; why = Failed (unspecified error)

# nfs
10.100.0.30:/svr/homes /mnt/share nfs defaults 0 0

sql> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
ORA-38500: USING CURRENT LOGFILE option not available without stand
```js

是因为没有standby redo log日志组，这次好像是丢失了。
查看日志组:
```js
idle>select member from v$logfile;

MEMBER
----------------------------------------------------------------------------------------------------
E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\REDO03.LOG
E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\REDO02.LOG
E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\REDO01.LOG

SQL>alter database add standby logfile group 4 ('E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\STDBYREDO01.LOG') size 50M;
Database altered.
SQL>alter database add standby logfile group 5 ('E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\STDBYREDO02.LOG') size 50M;
Database altered.
SQL>alter database add standby logfile group 6 ('E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\STDBYREDO03.LOG') size 50M;
Database altered.
SQL>alter database add standby logfile group 7 ('E:\\ORACLE\\PRODUCT\\10.2.0\\ORADATA\\ORCL\\STDBYREDO04.LOG') size 50M;
Database altered.

set linesize 200 
set term off verify off feedback off pagesize 999 
set markup html on entmap ON spool on preformat off
spool result.xls
@query.sql
spool off
exit

trap commands signals

$ kill -l

set -e

trap 'err_handler ${LINENO} $?' ERR 
function err_handler() {
 # some clean works
}

$ pg_dumpall -U user -h localhost -c --if-exists --role=postgres bzip2 > db.sql.bz2

pg_restore: \[archiver\] input file appears to be a text format dump. Please use psql

$ sudo -u postgres psql -f reis_2016_08_07.sql > import.log
psql:reis_2016_08_07.sql:24: ERROR: current user cannot be dropped
psql:reis_2016_08_07.sql:33: ERROR: role "postgres" already exists

DROP ROLE IF EXISTS postgres;
CREATE ROLE postgres;

sql> CREATE DIRECTORY dir_expdp as '\\\\192.168.0.82\\exp';

sql> SELECT * FROM dba_directories;

$ expdp system/passwd@orcl schemas=user1,user2 EXCLUDE=TABLE:"IN('table1','table2')"
directory=dir_expdp dumpfile=${dmp_file} logfile=${explog_file}

sql> show parameter cpu

$ expdp system/passwd@orcl schemas=user1,user2 EXCLUDE=TABLE:"IN('table1','table2')"
directory=dir_expdp dumpfile=db_%U.dmp logfile=explog_file parallel=16

$ impdp system/passwd@orcl schemas=user1,user2 directory=dir_impdp dumpfile=db_%U.dmp logfile=explog_file parallel=16

ora-31684 object type user already exists

schemas=user1,user2,user3
exclude=TABLE:"IN('table1','table2','table3','table4','table5')"
directory=dir_expdp
dumpfile=db_%U.dmp
logfile=db.log
parallel=4
version=10.2.0.3.0 

$ expdp parfile=expdp.par

EXCLUDE=object_type\[:name_clause\] \[, ...\]

$ gpg --keyserver pgp.mit.edu --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
$ gpg --export --armor 58118E89F3A912897C070ADBF76221572C52609D sudo apt-key add -

deb https://apt.dockerproject.org/repo debian-stretch main

deb https://apt.dockerproject.org/repo debian-jessie main

$ sudo service docker start

$ sudo docker run hello-world

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
c04b14da8d14: Pull complete 
Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
 3. The Docker daemon created a new container from that image which runs the
 executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
 to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker Hub account:
 https://hub.docker.com

For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/

$ sudo gpasswd -a $USER docker
Adding user xxx to group docker

$ sudo usermod -aG docker $USER

$ sudo service docker restart