sysv

服务的 ulimit 设置无效 设定 文件描述符 /etc/security/limits.conf 内容： * soft nproc 10000 * hard nproc 10000 * soft nofile 4194304 * hard nofile 4194304 /etc/sysctl.conf 片段： fs.nr_open = 5242880 fs.file-max = 4194304 /etc/profile.d/ulimit.sh 内容： #!/bin/bash [ "$(id -u)" == "0" ] && ulimit -n 4194304 ulimit -u 80000 /etc/pam.d/login 下相关文件片段 session required pam_limits.so service 启动的服务， Runtime 文件描述符仍是 1024 ？ :joy: grep 'open files' /proc/$(pgrep cron)/limits # Max open files 1024 4096 files SysV的系统设定（CentOS6/Debian7） initscript 增加一个 /etc/initscript 文件就可以改变所有 service 的 环境变量 了。 示例 # cat /etc/initscript ulimit -n

Say I have a go project that based on which OS, and in some cases which distro, I want to use say a Systemd client package vs an Upstart client package vs a sysv client package vs a launchd client package. Is it possible to selectively import each package so I only import the one I need per OS/distro I'm building for? Or do I have to import each package for each OS/distro? Package build Build Constraints A build constraint, also known as a build tag, is a line comment that begins // +build that lists the conditions under which a file should be included in the package. Constraints may appear in

Is there any way to compile GCC's libstdc++ with hash style SYSV instead of GNU/Linux? I have a toolchain (via crosstool-ng) that I use to compile our company library to work with a very wide range of Linux systems. One of these system is a very old RedHat that have only SYSV hash style, when I compile a C only library/program with the toolchain, it works great since the generated binary uses SYSV. But, when I link with libstdc++, the binary automatically changes to GNU/Linux style, the reason is because libstdc++ was built as GNU/Linux, hence the question. Running the binary in this system

How can I make use of the shmat() , shmdt() , shmctl() , shmget() calls from Python? Are they hidden somewhere in the standard library? Update0 I'm after System V bindings that can be found in the Ubuntu repositories, or Python standard libraries (now or in future releases). Google finds sysv_ipc . If you don't want to use any non-standard Python libraries, perhaps you could wrap the functions you need yourself using ctypes ? This page offers a feature matrix to help you choose between the posix_ipc , sysv_ipc , and shm modules. The processing package also supports shared memory objects, and

This question already has an answer here: How to Daemonize a Java Program? 11 answers I have a Java application, to start it I use java -jar myapp.jar To stop it I use CTRL+C. Now I need to convert that application to something that I can start with: /etc/init.d/myapp start And I can stop with: /etc/init.d/myapp stop The problem is all about saving the PID of the process, I think I saw somewhere a recipe for doing this, I don't remember where and I'm not able to find it. I saw that there is a project called Java Server Wrapper , but I look for something free that does not limit memory usage.

What are the differences between System V IPC and POSIX IPC ? Why do we have two standards ? How to decide which IPC functions to use ? Both have the same basic tools -- semaphores, shared memory and message queues. They offer a slightly different interface to those tools, but the basic concepts are the same. One notable difference is that POSIX offers some notification features for message queues that Sys V does not. (See mq_notify() .) Sys V IPC has been around for longer which has a couple of practical implications -- First, POSIX IPC is less widely implemented. I wrote a Python wrapper for