Differences between revisions 1 and 5 (spanning 4 versions)

Check connection

Simple script to check connection to a host, that in case of failure asks for new IP address through DHCP.

Add entry to crond of account with privileges to get address through dhclient:

chmod 755 /<folder>/checkConnection.sh
crontab -e
* * * * * /<folder>/checkConnection.sh

   1 #!/bin/sh
   2 PROG=checkConnection
   3 HOST=host.example.net
   4 ping $HOST -c 5 > /dev/null 
   5 RES=$?
   6 if [ $RES -eq 0 ]; then
   7   logger "$PROG: Ping to $HOST OK"
   8 else
   9   logger "$PROG: Ping to $HOST NOK, running dhclient eth0"
  10   dhclient eth0 -v
  11   # other seervices that may need restarting
  12 fi

On Slackware the logger output should appear on /var/log/messages.

-  ⇤ ← Revision 1 as of 2013-06-27 08:29:13 → 
  Size: 647
  Editor: bl14-188-151
  Comment:
+   ← Revision 5 as of 2013-10-02 20:02:22 → ⇥
  Size: 714
  Editor: 188
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 12:
-HOST=www.google.com
+HOST=host.example.net
 Line 16:
-  logger "$PROG: Ping OK"
+  logger "$PROG: Ping to $HOST OK"
 Line 18:
-  logger "$PROG: Ping NOK, running dhclient eth0"
+  logger "$PROG: Ping to $HOST NOK, running dhclient eth0"
 Line 20:
+  # other seervices that may need restarting
-Line 23:
+Line 24:
-On Slackware the logger output should apper on '''/var/log/messages'''.
+On Slackware the logger output should appear on '''/var/log/messages'''.