It stands for process statistics and you can use the ps command to see all the processes and find things. JPerf comes equipped with Iperf and its only goal is to take command line out of. You can also see that both greps are connected to the same pipeline (id 57573438) and that the STDOUT ( 1) of the first process is connected to the STDIN ( 0) of the second process. The ps command is used to check the process status. You can see the state of the grep process in the /proc tree: grep State /proc/28814/status The shell does not buffer the output and hold it until one process has completed and then transfers it to another process.įor example: tar -zcvf test.tgz /lib/ | grep bla | grep foo | grep bar Wed Feb 23 08:25:10 Error: couldn't connect to server 127.0.0.When piping commands, all processes are started at the same time and they just sleep (block) until I/O enters/exits them. 2 Answers Sorted by: 3 As Bravo points out, a pipe in Linux is not a file, it is dynamic. When -f is set, the full command line is used. pgrep -f keyword From the man page: -f The pattern is normally only matched against the process name. That makes pgrep match keywords in the whole command (including arguments) instead of just the process name. However if I close the initial shell I can't connect: -bash-3.2$ cd /var/lib 287 You can use pgrep as long as you include the -f options. If I open a separate shell I can then then connect to mongodb: -bash-3.2$ cd /var/lib Wed Feb 23 08:06:54 web admin interface listening on port 28017 Hopefully it can be useful in some kind of way. Below is a pretty dirty and quick script to loop through each process that is open and grab the Size, Rss, Pss and Shared Clean/Dirty usage. Wed Feb 23 08:06:54 waiting for connections on port 27017 If you have a newer kernel it should support /proc/pid/smaps which gives you some detailed information on each processes memory usage. What you had psresult (ps -efgrep exe) runs ps grep, and captures the output. The tricky is to make use of the ' ' supported by the shell to chain the command. if the pmon/oracle process is running in your environment the database is running. One way to exclude the grep line from ps output is to use an additional grep with the -v option to invert the search: ps grep vi grep -v grep. When I do this manually: kill ps -ef grep 1.sh it works perfectly, killing all processes with this name. if the command in any case returns output i.e. Let’s now take a look at a couple of ways to remove the grep from our results. MYCOMMAND.txt contains: sudo su -c 'kill ps -ef grep 1.sh' But the above command kills only 1 line (first that it finds), and I need to find and kill ALL processes with this name 1.sh. Check the oracle process runs: On Unx: ps -efgrep pmon. Wed Feb 23 08:06:54 git version: 0eb017e9b2828155a67c5612183337b89e12e291 Thanks to geekosaur, I would like to use this command for your demands, rather than a separated command: ps -ef head -1 ps -ef grep 'your-pattern-goes-here'. First thing first: you need to know the username and password to connect to database for step 2. ** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data mongodb-linux-i686-1.6.5/bin/mongod -help for help and startup options GNU long options, preceded by two dashes. How can I make the Mongodb connection persistent and auto start on server reboot? How to Use ps Command The general syntax for the ps command is as follows: ps OPTIONS For historical and compatibility reasons, the ps command accepts several different types of options: UNIX style options, preceded by a single dash. My question is how can I tell if Mongodb is running? Is there a simple command line query to check status? If I start it once from the shell will it keep running if I exit the shell (this doesn't seem to be the case). I have installed Mongodb and the PHP drivers on my Unix server.
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