Grep

I have the following text in a file called n8n-deployment: ... image: busybox:1.36 image: docker.io/n8nio/n8n:2.13.4 imagePullPolicy: IfNotPresent ... And I want to use Regex search and match the version of n8n, in this case 2.13.4 should be output. Here’s how this can be done using Ripgrep (rg) command. ➜ rg -N -o -P 'image.*n8n:\K.*$' n8n-deployment.yaml 2.13.4 Another way to do this is: ➜ rg -oN 'image.*n8n:(.*)' -r '$1' n8n-deployment.yaml 2.13.4 Or, with grep: ➜ grep -o -P 'image.*n8n:\K.*$' n8n-deployment.yaml 2.13.4 Explanation of flags: ...

I just setup a new server with a minimal installation of AlmaLinux 8. AlmaLinux is a variant of free Red Hat Enterprise Linux 8. It’s like a CentOS 8, but will have a full support until the end of RHEL 8 life cycle. This server is to serve as a new proxy for all VMs inside my home lab. I want to use tinyproxy which is need to be compiled from source as the RPM package is not available as of the time writing. After downloading the source code, and try to decompress it, I was presented with the following error message: ...

If you’re familiar with Kerberos, one way to check if a ticket is valid is to run klist command. ❯ klist Ticket cache: FILE:/tmp/krb5cc_1001 Default principal: username@UNIVERSITY.EDU.AU Valid starting Expires Service principal 02/07/21 11:26:50 02/07/21 21:26:50 krbtgt/UNIVERSITY.EDU.AU@UNIVERSITY.EDU.AU renew until 03/07/21 11:26:50 02/07/21 12:24:07 02/07/21 21:26:50 cifs/server1.UNIVERSITY.edu.au@UNIVERSITY.EDU.AU 02/07/21 12:24:07 02/07/21 21:26:50 cifs/server1.UNIVERSITY.edu.au@UNIVERSITY.EDU.AU ❯ date Mon 05 Jul 2021 16:01:59 AEST From the above output, the principal ticket expired since 2 Jul. So how do we find out if the Kerberos (principal) ticket expires programmatically? This is something that I was trying to find out a few years ago, but kinda have been forgotten due to low priority. ...

I have a server running CentOS 6 successfully upgraded to CentOS 7. The only problem I encountered so far is that ‘grep’ doesn’t work. [root@zilla ~]# grep grep: error while loading shared libraries: libpcre.so.0: cannot open shared object file: No such file or directory [root@zilla ~]# ldd /usr/bin/grep linux-vdso.so.1 => (0x00007ffc0b639000) libpcre.so.0 => not found libc.so.6 => /lib64/libc.so.6 (0x00007f6be1c6c000) /lib64/ld-linux-x86-64.so.2 (0x00007f6be2038000) First thing I tried was to reinstall pcre package which provides libpcre.so*. It still didn’t work. Fortunately, someone has posted a solution as the following: ...