When a GitLab CI/CD pipeline needs to persist job output or a rendered report, it will typically save it as an artifact on the job, or perhaps write it to an external storage service or as a GitLab Release archive. But it is also capable of pushing this file to its own git repository, stored … GitLab: add files to source repository as part of GitLab pipeline
If you need a way to simply encrypt and decrypt files or strings with a symmetric key (same password for encryption and decryption), openssl provides this functionality. Be sure to avoid weak ciphers such as 3DES, and employ salt as well as PBKDF2 iterations to reduce vulnerability to brute force attacks. Here is a simple … Linux: using openssl to encrypt and decrypt files and strings
A Bash script can often run into the situation where a utility in the pipeline creates a file, but because of an unexpected error, the size of the resulting file is zero bytes. And if that situation is not prepared for, the mere existence of the file might signal success to the following commands in … Bash: test both file existence and size to avoid signalling success
If you need to batch rename a set of files, the ‘rename‘ utility is much easier than alternatives such as pairing find/exec or even putting together a small script. The rename utility gives you all the power of Perl regular expressions for converting the filenames. # make sure utility is installed $ sudo apt install … Bash: batch renaming files using the rename utility
With Ansible, it is possible to have a variable populated with either the content of a remote or local file. For a file on a remote host, you can use the ‘slurp‘ module to put the content into a register, but then you must base64 decode the content. – name: get content of remote file … Ansible: creating a variable from a remote or local file content
If you are on an Ubuntu host and need to determine from which package a file originated, the ‘dpkg’ utility has this ability. For example, if you need to know which package the ‘mkpasswd’ binary came from: $ which mkpasswd /usr/bin/mkpasswd $ dpkg -S /usr/bin/mkpasswd whois: /usr/bin/mkpasswd Which tell us it came from the ‘whois’ … Ubuntu: Determining the package origin of a file
If you are using zip and find yourself needing to exclude a directory (.git, build, etc), the “-x” exclude switch can provide that functionality. Take the following directory structure: $ find . . ./two.txt ./skipme ./skipme/three.txt ./one.txt You can exclude the entire ‘skipme’ folder and everything in it with: zip -r myzip.zip * -x skipme/*
If you need KVM to bring up a full guest OS as quickly as possible, consider preparing a base disk image that can be used as the basis for any number of linked clones by using a backing file. This article is related to a previous article, “Cloning and fixing an Ubuntu host using KVM“. … KVM: Implementing linked clones with a backing file
The Putty suite contains several executables beyond the main application. It also has pscp.exe, a command line scp client, and plink.exe which is a command line ssh client. These clients can be used to run file transfers and commands against hosts in console mode, perfect for automation of repetitive tasks.
The Spring framework provides a proven and well documented model for the development of custom projects and services. The Spring Boot project takes an opinionated view of building production Spring applications, which favors convention over configuration. In this article we will explore how to configure a Spring Boot project to use the Simple Logging Facade … Spring: Spring Boot with SLF4J/Logback sending to syslog
strace is a handy utility for tracing system, file, and network calls on a Linux system. It can produce trace output for either an already running process, or it can create a new process. Some of the most common troubleshooting scenarios are needing to isolate either the network or file system activity of a process. … Ubuntu: Using strace to get a view into file and network activity of a process