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Tag: command-line

Number of processors/cores in command line

I am running the following command to get the number of processors/cores in Linux: It works but it does not look elegant. How would you suggest improve it ? Answer nproc is what you are looking for. More here :

Delete files older than X minutes

I would like to delete files that are older than 59 minutes. I have this so far: This doesn’t work and seems to delete all files. I’ve tested this several times and I think the issue is to do with daystart. I’ve read the man page and it seems to base time on the beginning of the day rather than

Backspace in zsh fails to work in quite the strange way

I’m on a fresh Virtualbox install of CentOS 6.4. After installing zsh 5.0.2 from source using ./configure –prefix=/usr && make && make install and setting it as the shell with chsh -s /usr/bin/zsh, everything is good. Then some time after, after installing python it seems, it starts acting strange. Happens with PuTTY and iTerm2 over SSH, does not happen on

bash: grep exact matches based on the first column

I have a .txt file like below: For example, I want to generate a subset with the IDs 4324321_A3 and 9342432 (based on the first column!). I tried the following command to find the exact matches: But when I use this line, I end up with a dataset like this: The problem is that the line that matches a part

getting pid of spawned exec in phing

I am using phing and running selenium server via ExecTask. Sometimes I need to stop running server by killing its process. Is there a possibility in phing of getting PID of process spawned in ExecTask ? Answer No, ExecTask cannot give the pid of spawned processes directly. It can only return it’s exit status and output. Maybe you can modify