Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Enable cron log in Ubuntu 10.04 (Lucid Lynx)
Answer:
By default, the output from cron goes into the default general system log "/var/log/syslog" in Ubuntu.
If you prefer to have an unique file for cron log, you can edit the file "/etc/rsyslog.d/50-default.conf"
Uncomment the line (Remove the #):
#cron.*
And finally restart the log service
# service rsyslog restart
Revert the effect of an earlier changeset in Mercurial
Answer:
In Mercurial, if you want to revert the effect of an earlier changeset, even the changes have been pushed to remote, it is still possible with the hg backout command.
1. Find the revision you want to backout using hg log
# hg log
2. Assume you want to backout to the revision 99, then you can
# hg backout -r 99
Printing the exclamation mark using echo
Answer:
You might observed a problem when you try to print the exclamation mark (!) using the echo command
E.g.
# echo "test!"
-bash: !": event not foundTo solve it, you can use single quote instead
# echo 'test!'
test!Renew DHCP IP address in Ubuntu
Answer:
To rename an IP address using DHCP in Ubuntu, try enter the commands below:
1. Release the current IP
# sudo dhclient -r2. Renew a new IP
# sudo dhclientSwap last two words in Bash
Answer:
Previous article we mentioned how to swap the last two characters in Bash, now we let you know how to Swap the last two words in Bash
Solution:
# foo bar
[Esc + t]That's simple, isn't?
