I am trying to recursively compare a directory in the local host to a directory in a remote linux machine. However, when i execute the next command: diff -r ‘ssh admin@10.0.0.10:/home/admin’ /home/admin it doesn’t work saying: diff: ssh admin@10.0.0.10:/home/admin: No such file or directory what is the right way to compare recursively the directories contents? … Read more
Linux newbie question I guess.. How can I find out where gem installs the gems on my Ubuntu 10 system? I want to read gem sourcecode and perhaps change things up a bit. Answer Running gem environment should give you a fair bit of information about your RubyGems installation. The field you’re looking for is … Read more
I need a C/C++ API that allows me to list the running processes on a Linux system, and list the files each process has open. I do not want to end up reading the /proc/ file system directly. Can anyone think of a way to do this? Answer http://procps.sourceforge.net/ http://procps.cvs.sourceforge.net/viewvc/procps/procps/proc/readproc.c?view=markup Is the source of ps … Read more
Console says [root@ip-172-31-18-2 mysql]# service mysqld start Starting mysqld (via systemctl): Job for mysqld.service failed because the control process exited with an error code. See “systemctl status mysqld.service” and “journalctl -xe” for details. mysqld.service [root@ip-172-31-18-2 mysql]# systemctl status mysqld.service ● mysqld.service – SYSV: MySQL database server. Loaded: loaded (/etc/rc.d/init.d/mysqld) Active: failed (Result: exit-code) since Sat … Read more
This question already has answers here: How can I pipe stderr, and not stdout? (11 answers) Closed 5 years ago. I want to lint a file, and print the stderr (error message), but do not print the stdout (saying the file is OK). php -l “foo/bar.php” If there are no errors, it prints a “No … Read more
In the linux kernel, what does the probe() method, that the driver provides, do? How different is it from the driver’s init function, i.e. why can’t the probe() functions actions be performed in the driver’s init function ? Answer Different device types can have probe() functions. For example, PCI and USB devices both have probe() … Read more
I have a set of Berkeley DB files on my Linux file system that I’d like to examine. What useful tools exist for getting a quick overview of the contents? I can write Perl scripts that use BDB modules for examining them, but I’m looking for some CLI utility to be able to take a … Read more
Example: file=”123 hello” How can I edit the string file such that it only contains the numbers and the text part is removed? So, echo $file should print 123 only. Answer This is one way with sed: $ echo $file | sed ‘s/[^0-9]*//g’ 123 $ echo “123 he23llo” | sed ‘s/[^0-9]*//g’ 12323 Or with pure … Read more
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 9 years ago. Improve this question I am trying to give sudo access to one of my users. What should I type in my terminal? Answer You need run … Read more
Is there any clever way to run a local Bash function on a remote host over ssh? For example: #!/bin/bash #Definition of the function f () { ls -l; } #I want to use the function locally f #Execution of the function on the remote machine. ssh user@host f #Reuse of the same function on … Read more
