Blog
Restricting SSH Authentication to the Local Network Using Match in OpenSSH (Ubuntu)
Karol Preiskorn2025-05-02T14:08:03+02:00May 2nd, 2025|Categories: linux, tool|Tags: config, devops, LinuxSecurity, NetworkSecurity, ssh, ubuntuTips|
Remove duplicated number in column
Karol Preiskorn2025-05-01T20:08:56+02:00September 1st, 2017|Categories: sql|Tags: data, find, html, oracle, regex, sql|
Conversion mp4 to mp3 in linux
Karol Preiskorn2025-05-01T20:04:56+02:00June 11th, 2015|Categories: linux|Tags: bash, linux, mp3|
Oracle SQL: Update a table with data from another table
Karol Preiskorn2025-05-01T19:03:07+02:00November 14th, 2018|Categories: sql|Tags: oracle, sql|
SQL Conversion national characters to ASCII without spaces
Karol Preiskorn2025-05-01T18:17:57+02:00December 11th, 2017|Categories: sql|Tags: plsql, replace, sql|
LOG ERRORS Oralce’s DML
Karol Preiskorn2025-05-01T18:10:05+02:00November 14th, 2018|Categories: sql|Tags: error, log, oracle, sql|
Unique session ID
Karol Preiskorn2025-05-01T18:05:57+02:00February 4th, 2016|Categories: sql|Tags: oracle, plsql, sql|
Verify type parameters call in Oracle procedure
Karol Preiskorn2025-05-01T18:04:09+02:00November 1st, 2024|Categories: plsql, sql|
Ubuntu dark mode
Karol Preiskorn2025-05-01T18:02:13+02:00May 1st, 2025|Categories: linux, tool|Tags: 24.04, dark, dark theme, theme, ubuntu|
Eslint
Karol Preiskorn2024-12-08T15:44:12+01:00December 8th, 2024|Categories: js, tool, typescript|Tags: eslint|
Create an SAPUI5 Application Project via proxy OData in node base development
Karol Preiskorn2024-10-06T07:16:19+02:00April 28th, 2021|Categories: abap, js|Tags: sapui5|
SAP ABAP count lines in internal table with where condition
Karol Preiskorn2024-09-29T18:08:47+02:00January 13th, 2021|Categories: abap|Tags: internal table, tables|
Dla zwykłego człowieka śmierć jest czymś realnym i może przyjść w każdej chwili…
Karol Preiskorn2024-09-23T08:28:01+02:00December 17th, 2017|Categories: life|Tags: quote|
Budda nie był masochistą
Karol Preiskorn2024-09-23T08:27:30+02:00March 3rd, 2018|Categories: life|Tags: quote|
Traveling on paths that have heart
Karol Preiskorn2024-09-23T08:25:09+02:00December 28th, 2019|Categories: life|Tags: quote|
SAP GUI 7.70 and theme Quartz and Quartz Dark
Karol Preiskorn2024-09-23T08:14:28+02:00February 22nd, 2021|Categories: abap, tool|Tags: dark, GUI, ui|
How to Show Progress Bar for Linux Commands
Karol Preiskorn2024-09-23T07:42:23+02:00October 4th, 2018|Categories: linux|Tags: bash, data, example, git, linux, terminal|
Alternative Quoting Mechanism (”Q”) for String Literals
Karol Preiskorn2024-09-16T18:38:14+02:00September 16th, 2024|Categories: plsql, sql|Tags: oracle, plsql, string|
PLSQL loop inexed by letters
Karol Preiskorn2024-09-08T16:24:48+02:00December 5th, 2016|Categories: sql|Tags: oracle, plsql, sql|
SAP ABAP ALV: LVC_FIELDCATALOG_MERGE how to use?
Karol Preiskorn2024-09-08T16:14:52+02:00September 29th, 2020|Categories: abap|Tags: abap, ALV, LVC_FIELDCATALOG_MERGE|
Show duplicates in internal table in ABAP
Karol Preiskorn2024-09-08T16:11:38+02:00January 22nd, 2022|Categories: abap|Tags: abap, internal table|
SAP ABAP update infotype 1000
Karol Preiskorn2024-09-08T16:10:24+02:00October 6th, 2020|Categories: abap|Tags: abap, infotype, om, rhgrenz4, sap|
Timestamp display in ALV
Karol Preiskorn2024-09-08T16:08:27+02:00November 4th, 2020|Categories: abap|Tags: abap, ALV, date, sap, timestamp|
