RHEL

strace fixes hung process

由 被刻印的时光 ゝ 提交于 2019-12-10 17:15:33
问题 I have a single threaded unix process that communicates over tcp with other processes. The problem is the following. When I start up the process it hangs (no busy loop) until I kill it. The funny thing is, as soon as I attach with strace to it, it continues to run with the expected behavior as if there was no problem at all. (always reproducible) What could be the reason for this behavior? What effect has strace on the state ob a process? Update: The cause of strace changing the behavior was,

Apache camel:bindy illegal argument exception

由 北慕城南 提交于 2019-12-10 11:34:49
问题 I am doing data format conversion between POJO to CSV and vice versa. In this while converting CSV to Object file(Unmarshalling) i am getting illegal argument exception for int data type. Only for string its working fine. Below is my POJO @CsvRecord(separator="//|",crlf="UNIX",generateHeaderColumns=false) public class EmployeeVO implements Serializable{ private static final long serialVersionUID = -663135747565879908L; @DataField(pos=1) private String name; @DataField(pos=3) private Integer

Building FFmpeg on RHEL4

由 ↘锁芯ラ 提交于 2019-12-10 10:13:45
问题 StackOverflow has yet to fail me, so don't let me down this time! I need to build FFmpeg on RHEL4 ... yes, 4! The version of make on RHEL4 is 3.80 , and the Makefile that ./configure generates when configuring FFmpeg does not seem to be compatible. When I make it throws a parse error every time. This happens on pretty much every software pkg I try and build. My applications group (at work) will not upgrade this machine, so please skip the suggestions to upgrade to RHEL5 or 6. What are my

Centos7 从源码安装/升级GCC(超详细)

由 瘦欲@ 提交于 2019-12-10 07:18:29
Centos7.6 默认安装的gcc版本为4.8.5，可通过命令 gcc -v 查看，如果需要使用gcc的最新特性，则需要源码安装gcc最新版。 gcc -v 输出的信息，包括生成 makefile 时候的 configure ，在步骤5可以参考该配置。 使用内建 specs。 COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper 目标：x86_64-redhat-linux 配置为：../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with

配置RedHat使用163的yum源

由 杀马特。学长 韩版系。学妹 提交于 2019-12-10 02:30:18
配置redhat 使用163 or sohu 的yum 源 1.#cp /etc/yum.repos.d/rhel-debuginfo.repo /etc/yum.repos.d/rhel-debuginfo.repo.bk 首先备份下redhat yum 的配置样例文件。 2.#wget http://mirrors.163.com/.help/CentOS-Base-163.repo 或者 #wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo 下载163或sohu提供的yum 配置文件 3.#vi CentOS-Base-163.repo 替换$releaserver 为5或者6[5/6为centos的版本] 4.#yum makecache 第3部不修改则第4部会出现如下错误：“ [root @localhost ~]# yum makecache Loaded plugins: rhnplugin, security This system is not registered with RHN. RHN support will be disabled. http://mirrors.163.com/centos/5Server/addons/i386/repodata/repomd.xml: [Errno 14]

I installed MySQL 8.x using yum, but I cannot find or reset the root password

由 橙三吉。 提交于 2019-12-09 23:19:56
问题 I had to install mysql 8.0 because previous version were crashing. Now I'm struggling with setting root password. The default empty password doesn't work, I've tried root , mysql as passwords but they are not working. I've created the init file to reset password. Unfortunately, my passwords are not accepted, here is my log: 2018-02-16T10:12:22.962733Z 0 [Warning] [MY-010139] Changed limits: max_open_files: 5000 (requested 8161) 2018-02-16T10:12:22.962815Z 0 [Warning] [MY-010142] Changed

人民邮电出版社专访刘遄老师：不做技术的搬运工。

由 巧了我就是萌 提交于 2019-12-09 22:06:56
刘遄（Liu Chuán），计算机信息技术方向教育学硕士，LinuxProbe网站创始人兼核心讲师，在高中时期便因兴趣的驱使而较早地接触Linux系统并开始学习运维技术。刘遄老师于2012年~2015年期间分别获得红帽RHCE工程师认证以及RHCA架构师顶ji认证。多年以来，一直从事Linux运维技术和红帽认证课程的培训工作，当前是国内开源行业颇具影响力的技术型大V。 刘遄老师早在高中时期便因为兴趣驱使而接触到Linux系统并开始学习运维技术，还先后获得了红帽认证管理员、红帽认证工程师以及最顶级的红帽认证架构师等证书。刘遄老师对Linux技术发自肺腑的热爱和痴迷，是他多年以来一直从事Linux系统运维培训以及红帽认证课程培训的源动力。在这个行业的长期浸淫，也让他成长为国内开源行业颇具影响力的技术大V。 刘遄老师针对Linux系统培训的教学思想相当具有前瞻性和独特性。他始终认为，一名优秀的IT技术培训讲师应该将技术知识进行提炼总结之后再传授给学生，而不能仅仅是一名技术知识的搬运工。 1． 异步社区：刘老师可以先简单介绍下自己以及书籍吗？ 最早接触到Linux系统并开始学习是在高中时期，那会主要是凭借兴趣的驱使，后来便热爱的一发不可收拾。那个时候的网络还不像现在这么便捷，没有这么多丰富的资料和书籍，培训市场也不成熟，安装Linux系统都要用6-7张光盘才行，确实算吃尽了自学的“苦头”

Installing 32 bit libraries (glibc) on 64 bit RHEL without using yum

由 为君一笑 提交于 2019-12-09 18:50:01
问题 I'm trying to get a 32-bit application to run on 64 bit RHEL 6.1, and the machine does not have access to the internet. Is there any way to install 32 bit glibc on 64 bit RHEL without using yum, i.e. just using RPM installs? I grabbed the glibc-*i686.rpm and many of its dependencies from the RHEL 6.1 ISO including nss-softokn-freebl*i686.rpm, but I still can't get it to install without ignoring dependencies (rpm --nodeps). 回答1: Mount the install DVD: mkdir -p /mnt/RHEL mount /dev/cdrom /mnt

The command '/bin/sh -c returned a non-zero code: 127

由 强颜欢笑 提交于 2019-12-09 07:33:11
问题 I'm new to docker so I might be doing this wrong, but I'm trying to install Tomcat6 through a Dockerfile which like this: FROM rhel7:latest RUN cd /tmp RUN "wget", "http://www.us.apache.org/dist/tomcat/tomcat-6/v6.0.44/bin/apache-tomcat-6.0.44.tar.gz" RUN tar xzf apache-tomcat-6.0.44.tar.gz RUN mv apache-tomcat-6.0.44 /usr/local/tomcat6 RUN cd /usr/local/tomcat6 Run ./bin/start.sh Its failing on the 3rd line with the: RUN "wget", "http://www.us.apache.org/dist/tomcat/tomcat-6/v6.0.44/bin

RODBC and Microsoft SQL Server: Truncating Long Character Strings

由 左心房为你撑大大i 提交于 2019-12-08 19:39:50
问题 I am trying to query a variable from a Microsoft SQL Server database using R/RODBC. RODBC is truncating the character string at 8000 characters. Original code: truncates at 255 characters (as per RODBC documentation) library(RODBC) con_string <- odbcConnect("DSN") query_string <- "SELECT text_var FROM table_name" dat <- sqlQuery(con_string, query_string, stringsAsFactors=FALSE) Partial solution: modifying query string truncate text after 7999 characters. library(RODBC) con_string <-
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