RHEL 6 Update GLIBC 2.12 to GLIBC 2.17

This often occurs when you build software in RHEL 7 and try to run on RHEL 6.

To update GLIBC to any version, simply download the package from

https://ftp.gnu.org/gnu/libc/

For example glibc-2.14.tar.gz in your case.

1. tar xvfz glibc-2.14.tar.gz
2. cd glibc-2.14
3. mkdir build
4. cd build
5. ../configure --prefix=/opt/glibc-2.14
6. make
7. su
8. make install
9. export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH

Then try to run your software, glibc-2.14 should be linked.

SQLite

Encrypt a database

The following example shows how to encrypt an existing database:

UniConnection.Database := 'C:\sqlite.db3';                                   // the name of the database to be encrypted
UniConnection.SpecificOptions.Values['ForceCreateDatabase'] := 'False';      // to check that the database exists
UniConnection.SpecificOptions.Values['Direct'] := 'True';                    // database file encryption is supported in the Direct mode only
UniConnection.SpecificOptions.Values['EncryptionAlgorithm'] := 'leBlowfish'; // the database will be encrypted with the Blowfish encryption algorithm
UniConnection.SpecificOptions.Values['EncryptionKey'] := '';                 // no encryption key specified, because the database is not encrypted yet
UniConnection.Open;                                                          // connect to the database
TLiteUtils.EncryptDatabase(UniConnection, '11111');                          // encrypt the database using the "11111" encryption key

Creating of a new encrypted database

The following example shows creating a new encrypted database:

UniConnection.Database : = 'C:\sqlite_encoded.db3';                          // the name of the database to be created
UniConnection.SpecificOptions.Values['ForceCreateDatabase'] := 'True';       // this will allow to create the new database
UniConnection.SpecificOptions.Values['Direct'] := 'True';                    // database file encryption is supported in the Direct mode only
UniConnection.SpecificOptions.Values['EncryptionAlgorithm'] := 'leBlowfish'; // the database will be encrypted with the Blowfish encryption algorithm
UniConnection.SpecificOptions.Values['EncryptionKey'] := '11111';            // the encryption key for the database
UniConnection.Open;                                                          // create and connect to the database

Connecting to an encrypted database

To connect to an existing encrypted database, the following should be performed:

UniConnection.Database := 'C:\sqlite_encoded.db3';                           // the name of the database to connect to
UniConnection.SpecificOptions.Values['ForceCreateDatabase'] := 'False';      // to check that the database exists
UniConnection.SpecificOptions.Values['Direct'] := 'True';                    // database file encryption is supported in the Direct mode only
UniConnection.SpecificOptions.Values['EncryptionAlgorithm'] := 'leBlowfish'; // the encryption algorithm of the database
UniConnection.SpecificOptions.Values['EncryptionKey'] := '11111';            // the encryption key for the database
UniConnection.Open;                                                          // connect to the database

Changing the encryption key for the database

To change the encryption key in the encrypted database, you must perform the following:

UniConnection.Database := 'C:\sqlite_encoded.db3';                           // the name of the database to connect to
UniConnection.SpecificOptions.Values['ForceCreateDatabase'] := 'False';      // to check that the database exists
UniConnection.SpecificOptions.Values['Direct'] := 'True';                    // database file encryption is supported in the Direct mode only
UniConnection.SpecificOptions.Values['EncryptionAlgorithm'] := 'leBlowfish'; // the encryption algorithm of the database
UniConnection.SpecificOptions.Values['EncryptionKey'] := '11111';            // the encryption key for the database
UniConnection.Open;                                                          // connect to the database
TLiteUtils.EncryptDatabase(UniConnection, '22222');                          // change the database encryption key to '22222'

After changing the encryption key, the database connection remains open and the further work with the database can continue. However, if disconnected from the database and for subsequent connection, the new value of the encryption key should be assigned to the UniConnection.EncryptionKey property.

oracle procedure v$session not detect

connect to sys as sysdba;

GRANT SELECT ON gv_$session TO system;

Cek Oracle Runing in Operating Sistem

SELECT PRODUCT, VERSION FROM SYS.PRODUCT_COMPONENT_VERSION; 
or

select dbms_utility.port_string from dual;

Delphi Popup Menu

procedure bCetakDetailClick(Sender: TObject);
var
   p : TPoint;
begin
   with Sender as TButton do
   begin
      if PopupMenu2 = nil then
         beep
      else
         begin
            GetCursorPos( p );
            p.x := Left + 1;
            p.y := Top + Height + 1;
            p := Self.ClientToScreen( p );
            PopupMenu2.popup( p.x, p.y );
         end;
   end;
end;

Algorithm negotiation failed for SSH Secure Shell Client

If you are using the dated SSH Secure Shell Client 3.2.9, you may have issue connect to the more updated OpenSSH Server.

If you cannot change the client (which is recommended), you will have to update the OpenSSH Server on Linux. Add this in

# vim /etc/ssh/sshd_config

# Ciphers
Ciphers aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,arcfour
KexAlgorithms diffie-hellman-group1-sha1

*If you are using Centrify-OpenSSH, you have to modify /etc/centrifydc/ssh/sshd_config and do the same

can't ssh into remote host with root, password incorrect - ubuntu

# vim /etc/ssh/sshd_config

PermitRootLogin without-password

change to

PermitRootLogin yes

Restart your ssh service.

restart ssh server.