Status and Return Code

05.StatusAndCode/01.ExitStatus.sh

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+#!/bin/bash
+
+ls /no/such/folder
+echo "$?"

05.StatusAndCode/02.CheckingHost.sh

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+#!/bin/bash
+
+HOST="www.google.com"
+ping -c 2 $HOST
+
+if [ "$?" -eq "0" ]
+then
+    echo "The Host $HOST is reachable."
+else
+    echo "The Host $HOST is NOT reachable."
+fi

05.StatusAndCode/03.ReturnCode.sh

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+#!/bin/bash
+
+HOST="www.google.com"
+ping -c 2 $HOST
+
+RETURN_CODE=$?
+
+# Here RETURN_CODE contains the
+# exit status
+
+if [ "$RETURN_CODE" != "0" ]
+then
+    echo "The Host $HOST is NOT reachable."
+fi

05.StatusAndCode/04.RC_Wait.sh

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+#!/bin/bash
+
+ping -c 1 -w 2 google.com
+echo $?
+
+ping -c 1 -w 2 anything.microsoft.com
+echo $?
+
+# man ping
+# N
+# /code
+# q

05.StatusAndCode/05.RC_With_Operators.sh

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+#!/bin/bash
+
+# Using && 
+
+mkdir LogicOpsLab && cp -v 04.RC_Wait.sh LogicOpsLab/04.RC_Wait.sh
+
+# -v is for verbose
+# cp is copy
+
+echo $?
+
+# Using ||
+
+cp -v 04.RC_Wait.sh LogicOpsLab/01.ExitStatus.sh || cp -v 04.RC_Wait.sh LogicOpsLabs/ExitStatus.sh
+echo $?