Configuring and Managing Core Dumps in Linux
Where is core file with abrt-hook-cpp installed?
How to read frames from a core dump (without GDB)? (read also comments!!)
Printing backtrace from coredump
$ sysctl kernel.core_pattern kernel.core_pattern = |/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t e %P %I %h $ grep "^DumpLocation" /etc/abrt/abrt.conf DumpLocation = /var/crash/abrt
ftp://ftp.pbone.net/mirror/vault.centos.org/7.9.2009/os/Source/SPackages/net-tools-2.0-0.25.20131004git.el7.src.rpm
RPM packaging: A simplified guide to creating your first RPM
How to create a Linux RPM package
RPM Packaging Guide
How to build rpm packages
What actually is $RPM_BUILD_ROOT?
├── src
│ └── source
├── build
│ └── executables, libraries, etc.
└── pkg
├── Makefile
├── myapp.spec
└── package
└── <empty>
BUILD_DIR = $(realpath .)/../build
PKG_BUILD_ROOT = $(realpath .)/package
PKG_DIR = /opt/myapp/mysubcomponent
PKG_NAME = myapp
PKG_VERSION = 1.0.0.5
PKG_RELEASE = 1
all :
rpmbuild -v -bb \
-D "BUILD_DIR $(BUILD_DIR)" \
-D "_topdir $(PKG_BUILD_ROOT)" \
-D "PKG_DIR $(PKG_DIR)" \
-D "PKG_NAME $(PKG_NAME)" \
-D "PKG_VERSION $(PKG_VERSION)" \
-D "PKG_RELEASE $(PKG_RELEASE)" \
myapp.spec
clean :
rm -rf "$(PKG_BUILD_ROOT)"
# Tags ----------------------------------------------------
Name: %{PKG_NAME}
Version: %{PKG_VERSION}
Release: %{PKG_RELEASE}
Summary: MyApp Summary
License: GPL
AutoReqProv: No
%description
MyApp Description
# Phases --------------------------------------------------
# Unpacking the sources %prep outside of packaging
# Building the software %build outside of packaging
# Installing the software in PKG_BUILD_ROOT
%install
PKG_PROTO=${RPM_BUILD_ROOT}%{PKG_DIR}
install -v -d ${PKG_PROTO}
rsync -av %{BUILD_DIR}/ ${PKG_PROTO}/
# Package the files (= include these files into the RPM package)
%files
%defattr(-,root,root,-)
%{PKG_DIR}
# Cleaning up %clean outside of packaging
# Embedded Scripts ---------------------------------------
%pre
echo "## INFO: %{PKG_NAME} : pre"
%post
echo "## INFO: %{PKG_NAME} : post"
%preun
echo "## INFO: %{PKG_NAME} : preun"
%postun
echo "## INFO: %{PKG_NAME} : postun"
$ tree package package ├── BUILD ├── BUILDROOT │ └── myapp-1.0.0.5-1.x86_64 │ └── opt │ └── myapp │ └── mysubcomponent │ ├── bin │ │ └── myexecutable │ ├── etc │ │ └── myconfig │ └── lib │ └── mylibrary.so ├── RPMS │ └── x86_64 │ └── myapp-1.0.0.5-1.x86_64.rpm ├── SOURCES ├── SPECS └── SRPMS
$ make
rpmbuild -v -bb \
-D "BUILD_DIR /home/andreas/src/myapp/build" \
-D "_topdir /home/andreas/src/myapp/pkg/package" \
-D "PKG_DIR /opt/myapp/mysubcomponent" \
-D "PKG_NAME myapp" \
-D "PKG_VERSION 1.0.0.5" \
-D "PKG_RELEASE 1" \
myapp.spec
Executing(%install): /bin/sh -e /var/tmp/rpm-tmp.AW6YVB
+ umask 022
+ cd /home/andreas/src/myapp/pkg/package/BUILD
+ '[' /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64 '!=' / ']'
+ rm -rf /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64
++ dirname /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64
+ mkdir -p /home/andreas/src/myapp/pkg/package/BUILDROOT
+ mkdir /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64
+ PKG_PROTO=/home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64/opt/myapp/mysubcomponent
+ install -v -d /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64/opt/myapp/mysubcomponent
install: creating directory '/home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64/opt'
install: creating directory '/home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64/opt/myapp'
install: creating directory '/home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64/opt/myapp/mysubcomponent'
+ rsync -av /home/andreas/src/myapp/build/ /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64/opt/myapp/mysubcomponent/
sending incremental file list
./
bin/
bin/myexecutable
etc/
etc/myconfig
lib/
lib/mylibrary.so
sent 14,794 bytes received 187 bytes 29,962.00 bytes/sec
total size is 14,064 speedup is 0.94
+ /usr/lib/rpm/check-buildroot
+ /usr/lib/rpm/redhat/brp-compress
+ /usr/lib/rpm/redhat/brp-strip /usr/bin/strip
+ /usr/lib/rpm/redhat/brp-strip-comment-note /usr/bin/strip /usr/bin/objdump
+ /usr/lib/rpm/redhat/brp-strip-static-archive /usr/bin/strip
+ /usr/lib/rpm/brp-python-bytecompile /usr/bin/python 1
+ /usr/lib/rpm/redhat/brp-python-hardlink
+ /usr/lib/rpm/redhat/brp-java-repack-jars
Processing files: myapp-1.0.0.5-1.x86_64
Provides: myapp= 1.0.0.5-1. myapp(x86-64) = 1.0.0.5-1
Requires(interp): /bin/sh /bin/sh /bin/sh
Requires(rpmlib): rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1 rpmlib(CompressedFileNames) <= 3.0.4-1
Requires(pre): /bin/sh
Requires(post): /bin/sh
Requires(preun): /bin/sh
Checking for unpackaged file(s): /usr/lib/rpm/check-files /home/andreas/src/myapp/pkg/package/BUILDROOT/myapp-1.0.0.5-1.x86_64
Wrote: /home/andreas/src/myapp/pkg/package/RPMS/x86_64/myapp-1.0.0.5-1.x86_64.rpm
$ yum install /home/andreas/src/myapp/pkg/package/RPMS/x86_64/myapp-1.0.0.5-1.x86_64.rpm [...] Install 1 Package Total size: 11 M Installed size: 11 M Is this ok [y/d/N]: y Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction ## INFO: myapp : pre Installing : myapp-1.0.0.5-1.x86_64 ## INFO: myapp : post Verifying : myapp-1.0.0.5-1.x86_64 Installed: myapp.x86_64 0:1.0.0.5-1 Complete!
$ yum erase myapp [...] Remove 1 Package Installed size: 9.6 M Is this ok [y/N]: y Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction ## INFO: myapp : preun Erasing : myapp-1.0.0.5-1.x86_64 ## INFO: myapp : postun Verifying : myapp-1.0.0.5-1.x86_64 Removed: myapp-1.0.0.5-1.x86_64 Complete!
Directives For the %files list
The %dir Directive As we mentioned in the Section called The %files List, if a directory is specified in the %files list, the contents of that directory, and the contents of every directory under it, will automatically be included in the package. While this feature can be handy (assuming you are sure that every file under the directory should be packaged) there are times when this could be a problem. The way to get around this, is to use the %dir directive.
Packaging Tutorial: GNU Hello
Automatic Filtering of Provides and Requires
What actually is $RPM_BUILD_ROOT?
$RPM_BUILD_ROOT(or the equivalent%{buildroot}SPEC file macro) always
holds the directory under which RPM will look for any files to package.
How do I prevent rpmbuild form injecting requirements into RPM package?
Disable rpmbuild automatic requirement finding (AutoReqProv: no)
Understanding RPM Versions and Naming Schemes
[name]-[version]-[release].[arch].rpm
What does %defattr mean in RPM spec files?
The %defattr Directive
The %defattr directive allows setting of default attributes for files and directives.
The %defattr has a similar format to the %attr directive:
1. The default permissions, or "mode" for files.
2. The default user id.
3. The default group id.
4. The default permissions, or "mode" for directories.
The %attr directive has the following format:
%defattr(file mode, user, group, dir mode)
Baeldung: The install Command in Linux
When is -av NOT the appropriate option for rsync?
verbose
archive mode
includes:
-r, --recursive recurse into directories -l, --links copy symlinks as symlinks -p, --perms preserve permissions -t, --times preserve modification times -g, --group preserve group -o, --owner preserve owner (super-user only) -D same as --devices --specials --devices preserve device files (super-user only) --specials preserve special files
and excludes:
-H, --hard-links preserve hard links -A, --acls preserve ACLs (implies -p) -X, --xattrs preserve extended attributes
Was ist der ELK Stack? (ELK = Elasticsearch, Logstash und Kibana ==> Elastic Stack mit Beats)
How to forward events from logstash to Splunk
Deploying Redis with the ELK Stack
Sending logs from filebeat to redis and then logstash
Filebeats: Configure the Redis output
Splunk Integration
Cribl Integration
Sleeping Good At Night — Kafka Configurations Tweaks
BigPanda’s pipeline handles millions of events per second using micro services architecture which is heavily dependent on Kafka.We are using Kafka as an events streaming platform which helps our micro services “talk” with each other.
Set up and use HTTP Event Collector in Splunk Web
Supported integrations
Elastic + Cribl help organizations migrate SIEM and keep it simple
Getting Started with BigPanda (Playlist)
Fast Track Video Series #7 – Getting started with BigPanda
Machine Learning & AIOps: Why IT Operations & Monitoring Teams Should Care
UBS invests in BigPanda to help drive digital disruption and innovation in AIOps
How to install and configure elasticsearch Auditbeat [7.x] | Auditbeat tutorial for beginners
[ Elasticsearch 12 ] How to configure and use AuditBeat
View Your System Logs with Elastic in Under 10 Minutes
Everything you Always Wanted to Know about Filebeat * But Were Afraid to Ask
Webinar: Elastic: Was sind Beats (Webinar vom 11. Mai 2022)
Course | Apache Kafka Fundamentals (Playlist), Confluent
Apache Kafka Tutorials | Kafka 101, Confluent
Apache Kafka in 1 hour for C# Developers – Guilherme Ferreira – NDC London 2023, NDC Conferences
System Design: Why is Kafka fast?, ByteByteGo
Apache Kafka for Beginners (3+ hours long), Bogdan Stashchuk
Was ist Kafka?, IBM Technology
“Undefined reference to” template class constructor [duplicate]
Why can templates only be implemented in the header file?
c++ Error ‘template
$ readelf -S <executable>
[...]
[29] .debug_aranges PROGBITS 0000000000000000 0001e5dd
00000000000025d0 0000000000000000 0 0 1
[30] .debug_info PROGBITS 0000000000000000 00020bad
00000000000fe146 0000000000000000 0 0 1
[31] .debug_abbrev PROGBITS 0000000000000000 0011ecf3
00000000000078ba 0000000000000000 0 0 1
[32] .debug_line PROGBITS 0000000000000000 001265ad
0000000000009e15 0000000000000000 0 0 1
[33] .debug_str PROGBITS 0000000000000000 001303c2
00000000000461b1 0000000000000001 MS 0 0 1
[34] .debug_ranges PROGBITS 0000000000000000 00176573
00000000000027d0 0000000000000000 0 0 1
[...]
Error appears, but intellisense works #2179
Squiggles are disabled for this translation unit #3852
Cannot open source file; C++; Visual Studio
{
"C_Cpp.loggingLevel": "Debug",
}
std::thread
std::mutex
std::condition_variable
Daily bit(e) of C++ | std::condition_variable
Const Correctness / C vs. C++ Differences
error: passing xxx as ‘this’ argument of xxx discards qualifiers
you’re calling a non-const member function on const object which is not allowed because non-const member functions make NO PROMISE not to modify the object
What is the meaning of ‘const’ at the end of a member function declaration?
declaring a const instance of a class
error: passing xxx as 'this' argument of xxx discards qualifiers error: passing ‘const Foo’ as ‘this’ argument of ‘void Foo::bar()’ discards qualifiers [-fpermissive]
class Foo {
public:
Foo() {};
virtual ~Foo() {};
// must be const:
// void bar() const {};
void bar() {};
};
int
main(int argc, char *argv[])
{
const Foo foo;
foo.bar();
return 0;
}