bash if statement how to test program output without assigning to variable
A common method in bash is to assign output to a variable like this:
somevar=`uptime`
That works too but it could be more efficient to do something like this:
if [[ $(uptime|awk '{print $3}') > 20 ]]; then
echo "uptime greater than 20 days";
fi........
[warn] VirtualHost 10.2.5.101:443 overlaps with VirtualHost 10.2.5.101:443, the first has precedence, perhaps you need a NameVirtualHost directive
[root@thetor2017 conf]# service httpd restart
Stopping httpd: [ OK ]
Starting httpd: WARNING: MaxClients of 3000 exceeds ServerLimit value of 300 servers,
lowering MaxClients to 300. To increase........
Apache Centos Stopping httpd: [ OK ] Starting httpd: [Wed Jun 29 19:29:44 2016] [warn] _default_ VirtualHost overlap on port 80, the first has precedence [Wed Jun 29 19:29:44 2016] [warn] _default_ Virtual
Stopping httpd: [ OK ]
Starting httpd: [Wed Jun 29 19:29:44 2016] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Wed Jun 29 19:29:44 2016] [warn] _default_ VirtualHost overlap on........
OpenVZ/vzctl how to do an on-line migration without downtime
vzmigrate --online dest-host VEIDNO
eg.:
vzmigrate --oneline 192.168.1.55 101
One option I would recommend is "--keep-dst", that way if the migration is interrupted you can still bring the VPS back up on the original host. After the migration is successful you can manually destroy it.
OpenVZ has a good writeup on this including Checkpointing and Restoring etc:........
PHP cannot access /usr/bin/openssl
PHP cannot access /usr/bin/opensslI have verified the username that runs the process is able to access /usr/bin/openssl and it does exist but the PHP script is saying it doesn't exist:
[code:1:1fd0f3abbe]
if (!file_exists($OPENSSL)) {
//echo "ERROR: OPENSSL $OPENSSL not foundn";
}[/code:1:1fd0f3abbe]
I don't get itI can clearly see the contents of /usr/bin by using the PHP system fu........
HTML Create DropDown List
HTML Create DropDown List[code:1:309976db0d]
Text To Display
[/code:1:309976db0d]........
Heredoc warnings
Heredoc warningsExample
$somevariable = ........
MySQL SubQuery
MySQL SubQueryI was trying to do a sub-query here but it wouldn't work (Syntax Error) in MySQL for some reason even though based on the SQL standards it should be ok.
[i:1268bfa39e][b:1268bfa39e]I found the reason this doesn't work. I am using MySQL 3.23 and I read on the MySQL web site that versions before 4.1 DO NOT SUPPORT SUB-QUERIES so it showed me how to rewrite the following as a LEFT join instead of a sub-query.
[/b:1268bfa39e][/i:1268bfa39e]........
Bash Scripting Variable Scope Using Piped While Loop
I've been struggling with this for awhile, wondering why all of my variables are null. Ijust realized the variables disappear after leaving this while loop.
Note that I'm piping to the while loop which makes a subshell Ibelieve which is the cause of the issue:
echo "$accounts"|while read thisline; do
somevariable="some value"
(( ++counter ))
done
At all costs you ne........