diff --git a/bindings/java/src/org/sleuthkit/datamodel/OsAccountManager.java b/bindings/java/src/org/sleuthkit/datamodel/OsAccountManager.java
index 89f3789fa537156439006da6127be09e904dcd80..6b2c74ea5783aac8d7b98f7e458c55b116f923b2 100755
--- a/bindings/java/src/org/sleuthkit/datamodel/OsAccountManager.java
+++ b/bindings/java/src/org/sleuthkit/datamodel/OsAccountManager.java
@@ -333,7 +333,7 @@ public OsAccount newWindowsOsAccount(String sid, String loginName, OsAccountReal
 		}
 	}
 	
-		/**
+	/**
 	 * Creates a local OS account with Linux-specific data. If an account already
 	 * exists with the given id or realm/login, then the existing OS account is
 	 * returned.
@@ -505,7 +505,7 @@ private Optional<OsAccount> getOsAccountByAddr(String uniqueId, Host host, CaseD
 
 		String queryString = "SELECT accounts.os_account_obj_id as os_account_obj_id, accounts.login_name, accounts.full_name, "
 				+ " accounts.realm_id, accounts.addr, accounts.signature, "
-				+ "	accounts.type, accounts.status, accounts.admin, accounts.created_date, accounts.db_status, "
+				+ "	accounts.type, accounts.status, accounts.created_date, accounts.db_status, "
 				+ " realms.realm_name as realm_name, realms.realm_addr as realm_addr, realms.realm_signature, realms.scope_host_id, realms.scope_confidence, realms.db_status as realm_db_status "
 				+ " FROM tsk_os_accounts as accounts"
 				+ "		LEFT JOIN tsk_os_account_realms as realms"
@@ -1855,6 +1855,69 @@ private OsAccountUpdateResult updateCoreWindowsOsAccountAttributes(OsAccount osA
 		return updateStatus;
 	}
 
+	/**
+	 * Update the address and/or login name for the specified account in the
+	 * database.
+	 *
+	 * A column is updated only if its current value is null and a non-null
+	 * value has been specified.
+	 *
+	 * @param osAccount     OsAccount that needs to be updated in the database.
+	 * @param uid           Account ID, may be null.
+	 * @param loginName     Login name, may be null.
+	 *
+	 * @return OsAccountUpdateResult Account update status, and the updated
+	 *         account.
+	 *
+	 * @throws TskCoreException If there is a database error or if the updated
+	 *                          information conflicts with an existing account.
+	 */
+	public OsAccountUpdateResult updateCoreLocalLinuxOsAccountAttributes(OsAccount osAccount, String uid, String loginName) throws TskCoreException {
+		CaseDbTransaction trans = db.beginTransaction();
+		try {
+			OsAccountUpdateResult updateStatus = this.updateCoreLocalLinuxOsAccountAttributes(osAccount, uid, loginName, trans);
+
+			trans.commit();
+			trans = null;
+			return updateStatus;
+		} finally {
+			if (trans != null) {
+				trans.rollback();
+			}
+		}
+	}
+	
+	/**
+	 * Update the address and/or login name for the specified account in the
+	 * database.
+	 *
+	 * A column is updated only if it's current value is null and a non-null
+	 * value has been specified.
+	 *
+	 * @param osAccount  OsAccount that needs to be updated in the database.
+	 * @param uid        Account ID, may be null.
+	 * @param loginName  Login name, may be null.
+	 *
+	 * @return OsAccountUpdateResult Account update status, and the updated
+	 *         account.
+	 *
+	 * @throws TskCoreException If there is a database error or if the updated
+	 *                          information conflicts with an existing account.
+	 */
+	private OsAccountUpdateResult updateCoreLocalLinuxOsAccountAttributes(OsAccount osAccount, String uid, String loginName, CaseDbTransaction trans) throws TskCoreException {
+		
+		// Update the account core data
+		OsAccountUpdateResult updateStatus = this.updateOsAccountCore(osAccount, uid, loginName, trans);
+
+		Optional<OsAccount> updatedAccount = updateStatus.getUpdatedAccount();
+		if (updatedAccount.isPresent()) {
+			// After updating account data, check if there is matching account to merge
+			mergeOsAccount(updatedAccount.get(), trans);
+		}
+		
+		return updateStatus;
+	}
+	
 	/**
 	 * Update the address and/or login name for the specified account in the
 	 * database.
@@ -1911,7 +1974,32 @@ private OsAccountUpdateResult updateOsAccountCore(OsAccount osAccount, String ad
 			String newLoginName = currAccount.getLoginName().orElse(null);
 
 			String newSignature = getOsAccountSignature(newAddress, newLoginName);
-			updateAccountSignature(osAccount.getId(), newSignature, connection);
+			
+			try {
+				updateAccountSignature(osAccount.getId(), newSignature, connection);
+			} catch (SQLException ex) {
+				// There's a slight chance that we're in the case where we are trying to add an addr to an OS account
+				// with only a name where the addr already exists on a different OS account. This will cause a unique
+				// constraint failure in updateAccountSignature(). This is unlikely to happen in normal use
+				// since we lookup OS accounts by addr before name when we have both (i.e., it would be strange to have an
+				// OsAccount in hand with only the loginName set when we also know the addr). 
+				// Correctly handling every case here is non-trivial, so for the moment only look for the specific case where
+				// we had an OsAccount with just an addr and and OsAccount with just a login name that we now 
+				// want to combine.
+				if (osAccount.getAddr().isEmpty() && !StringUtils.isBlank(address)) {
+					OsAccountRealm realm = db.getOsAccountRealmManager().getRealmByRealmId(osAccount.getRealmId(), connection);
+					Optional<OsAccount> matchingAddrAcct = getOsAccountByAddr(address, realm.getScopeHost().get(), connection);
+					if (matchingAddrAcct.isEmpty() 
+							|| matchingAddrAcct.get().getId() == osAccount.getId()
+							|| matchingAddrAcct.get().getLoginName().isPresent()) {
+						throw ex; // Rethrow the original error
+					}
+					
+					// What we should have is osAccount with just a loginName and matchingAddrAcct with 
+					// just an address, so merge them.
+					mergeOsAccounts(matchingAddrAcct.get(), osAccount, trans);
+				}
+			}
 
 			// get the updated account from database
 			updatedAccount = getOsAccountByObjectId(osAccount.getId(), connection);
@@ -1921,7 +2009,7 @@ private OsAccountUpdateResult updateOsAccountCore(OsAccount osAccount, String ad
 
 			return new OsAccountUpdateResult(updateStatusCode, updatedAccount);
 
-		} catch (SQLException ex) {
+		} catch (SQLException ex) {			
 			throw new TskCoreException(String.format("Error updating account with unique id = %s, account id = %d", osAccount.getAddr().orElse("Unknown"), osAccount.getId()), ex);
 		}
 	}
diff --git a/bindings/java/test/org/sleuthkit/datamodel/OsAccountTest.java b/bindings/java/test/org/sleuthkit/datamodel/OsAccountTest.java
index b18826c9b745bdaad566dd51e4270b7be1dc0bcb..d086cd9feb642c8999624a156c511d976dfc36f9 100644
--- a/bindings/java/test/org/sleuthkit/datamodel/OsAccountTest.java
+++ b/bindings/java/test/org/sleuthkit/datamodel/OsAccountTest.java
@@ -770,6 +770,80 @@ public void basicOsAccountTests() throws TskCoreException, OsAccountManager.NotU
 
 	}
 	
+	@Test
+	public void basicLinuxOsAccountTests() throws TskCoreException {
+
+		try {
+			String hostname1 = "linuxTestHost";
+			Host host1 = caseDB.getHostManager().newHost(hostname1);
+			
+			// Create an account with uid and username
+			String uid1 = "501";
+			String loginName1 = "user1";
+			
+			OsAccount osAccount1 = caseDB.getOsAccountManager().newLocalLinuxOsAccount(uid1, loginName1, host1);
+			assertEquals(osAccount1.getAddr().orElse("").equalsIgnoreCase(uid1), true);
+			assertEquals(osAccount1.getLoginName().orElse("").equalsIgnoreCase(loginName1), true);
+			
+			Optional<OsAccount> osAccount1loadWithUID = caseDB.getOsAccountManager().getLocalLinuxOsAccount(uid1, null, host1);
+			assertEquals(osAccount1loadWithUID.isPresent(), true);
+			assertEquals(osAccount1loadWithUID.get().getAddr().orElse("").equalsIgnoreCase(uid1), true);
+			assertEquals(osAccount1loadWithUID.get().getLoginName().orElse("").equalsIgnoreCase(loginName1), true);
+				
+			// Create an account with only a UID then update it
+			String uid2 = "502";
+			String loginName2 = "user2";
+			
+			OsAccount osAccount2 = caseDB.getOsAccountManager().newLocalLinuxOsAccount(uid2, null, host1);
+			assertEquals(osAccount2.getAddr().orElse("").equalsIgnoreCase(uid2), true);
+			assertEquals(osAccount2.getLoginName().isEmpty(), true);
+			
+			OsAccountManager.OsAccountUpdateResult updateResult = caseDB.getOsAccountManager()
+					.updateCoreLocalLinuxOsAccountAttributes(osAccount2, uid2, loginName2);
+            Optional<OsAccount> oOsAccount2Updated = updateResult.getUpdatedAccount();
+			
+			assertEquals(updateResult.getUpdateStatusCode().equals(OsAccountManager.OsAccountUpdateStatus.UPDATED), true);
+			assertEquals(oOsAccount2Updated.isPresent(), true);
+			assertEquals(oOsAccount2Updated.get().getAddr().orElse("").equalsIgnoreCase(uid2), true);
+			assertEquals(oOsAccount2Updated.get().getLoginName().orElse("").equalsIgnoreCase(loginName2), true);
+			
+			// Test unusual merge case (unusual because we're updating the account with the name, not the UID)
+			String uid3 = "503";
+			String loginName3 = "user3";
+			
+			OsAccount osAccount3uidOnly = caseDB.getOsAccountManager().newLocalLinuxOsAccount(uid3, null, host1);
+			OsAccount osAccount3nameOnly = caseDB.getOsAccountManager().newLocalLinuxOsAccount(null, loginName3, host1);
+			
+			updateResult = caseDB.getOsAccountManager()
+					.updateCoreLocalLinuxOsAccountAttributes(osAccount3nameOnly, uid3, loginName3);
+            Optional<OsAccount> oOsAccount3Updated = updateResult.getUpdatedAccount();
+			
+			assertEquals(updateResult.getUpdateStatusCode().equals(OsAccountManager.OsAccountUpdateStatus.UPDATED), true);
+			assertEquals(oOsAccount3Updated.isPresent(), true);
+			assertEquals(oOsAccount3Updated.get().getAddr().orElse("").equalsIgnoreCase(uid3), true);
+			assertEquals(oOsAccount3Updated.get().getLoginName().orElse("").equalsIgnoreCase(loginName3), true);
+			
+			// Test normal merge case
+			String uid4 = "504";
+			String loginName4 = "user4";
+			
+			OsAccount osAccount4uidOnly = caseDB.getOsAccountManager().newLocalLinuxOsAccount(uid4, null, host1);
+			OsAccount osAccount4nameOnly = caseDB.getOsAccountManager().newLocalLinuxOsAccount(null, loginName4, host1);
+			
+			updateResult = caseDB.getOsAccountManager()
+					.updateCoreLocalLinuxOsAccountAttributes(osAccount4uidOnly, uid4, loginName4);
+            Optional<OsAccount> oOsAccount4Updated = updateResult.getUpdatedAccount();
+			
+			assertEquals(updateResult.getUpdateStatusCode().equals(OsAccountManager.OsAccountUpdateStatus.UPDATED), true);
+			assertEquals(oOsAccount4Updated.isPresent(), true);
+			assertEquals(oOsAccount4Updated.get().getAddr().orElse("").equalsIgnoreCase(uid4), true);
+			assertEquals(oOsAccount4Updated.get().getLoginName().orElse("").equalsIgnoreCase(loginName4), true);
+			
+		} finally {
+			
+		}
+
+	}
 	
 	@Test
 	public void windowsSpecialAccountTests() throws TskCoreException, OsAccountManager.NotUserSIDException {