POSIX | ASCII | Description |
---|---|---|
[:alnum:] | [A-Za-z0-9] | Alphanumeric characters |
[:alpha:] | [A-Za-z] | Alphabetic characters |
[:blank:] | [ \t] | Space and tab |
[:cntrl:] | [\x00-\x1F\x7F] | Control characters |
[:digit:] | [0-9] | Digits |
[:graph:] | [\x21-\x7E] | Visible characters |
[:lower:] | [a-z] | Lowercase letters |
[:print:] | [\x20-\x7E] | Visible characters and spaces |
[:punct:] | [!"#$%&'()*+,-./:;?@[\\\]_`{|}~] | Punctuation characters |
[:space:] | [ \t\r\n\v\f] | Whitespace characters |
[:upper:] | [A-Z] | Uppercase letters |
[:xdigit:] | [A-Fa-f0-9] | Hexadecimal digits |
2007-10-29
POSIX bracket expressions
2007-07-19
ssh-agent start up scritp
To activate ssh-agent when login, I put some scripts in my bash profile.
=> .bash_profile
=> .bash_logout
=> .bash_profile
#-------------------------------------------------------------------
SSH_ENV=${HOME}/.ssh/environment
function start_agent {
echo -n "Initialising new SSH agent..."
sleep 1
ssh-agent | sed 's/^echo/#echo/' > ${SSH_ENV}
echo "succeeded!"
source ${SSH_ENV}
ssh-add;
}
# Source SSH settings, if applicable
if [ -f "${SSH_ENV}" ]; then
source ${SSH_ENV}
#ps ${SSH_AGENT_PID} doesn't work under cygwin
( ps -ef | grep ${SSH_AGENT_PID} \
&& ps ux| grep ${SSH_AGENT_PID} ) \
> /dev/null || {
start_agent
}
else
start_agent
fi
=> .bash_logout
#-------------------------------------------------------------------
function quit_agent {
echo -n "Cleaning ssh-agent settins..."
sleep 1
ssh-add -D
ssh-agent -k > /dev/null 2>&1
unset SSH_AGENT_PID
unset SSH_AUTH_SOCK
echo "succeeded!"
sleep 1
}
if [ ${SSH_AGENT_PID+1} == 1 ]; then
echo -n "Quit ssh-agent? (No or Yes) "
while [ 1 ]; do
read ANS
case ${ANS} in
[Yy][Ee][Ss]|[Yy])
quit_agent
exit
;;
[Nn][Oo]|[Nn])
echo "ssh-agent will continue to serve!"
sleep 2
exit
;;
*)
echo -n "What do you mean? (No or Yes)"
;;
esac
done
fi
2007-01-26
FreeBSD under VMware, the time is delay
I found out my freebsd6.2 was complained about time is delayed.
After google, I found this post is useful, FreeBSD detects time via APIC.
You can set following line in /boot/loader.conf
hint.apic.0.disabled=1
Then reboot your FreeBSD, things will go to be different.
After google, I found this post is useful, FreeBSD detects time via APIC.
You can set following line in /boot/loader.conf
hint.apic.0.disabled=1
Then reboot your FreeBSD, things will go to be different.
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