AWK, kilka przydatnych poleceń.

Free(BSD)

AWK jest bardzo przydatnym programem (a właściwie językiem programowania). Ale używane rzadko, z uwagi na swoją specyficzną składnie jest trudne w użyciu.

Poniej kilka przykładów wykorzystania tego polecenia:

history | awk -v f=1 -v t=3 '{for(i=1;i<=NF;i++)if(i>=f&&i<=t)continue;else printf("%s%s",$i,(i!=NF)?OFS:ORS)}'

pokazuje tylko polecenia historii bash, bez wypisywania daty i godziny

awk '{print $1 $2}' FILE

pokaż pierwszą i drugą kolumnę

awk '{print $NF}' FILE

pokaż ostatnią kolumnę pliku

https://www.shellhacks.com/awk-print-column-change-field-separator-linux-bash/

No Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Linux
Multi-Linux Manager, what makes this product interesting for the Enterprises.

Interesting links: [1] https://documentation.suse.com/liberty/7/html/suma-quickstart/art-suma-quickstart.html[2] https://documentation.suse.com/liberty/7/html/compliance-scans/art-compliance-scans.html[3] https://documentation.suse.com/liberty/7/html/quickstart-scc/art-quickstart-scc.html[4] https://documentation.suse.com/liberty/9/[5] https://documentation.suse.com/en-us/sles/15-SP7/html/SLES-all/cha-klp.html[6] https://documentation.suse.com/multi-linux-manager/5.1/en/docs/administration/maintenance-windows.html[7] https://documentation.suse.com/multi-linux-manager/5.1/en/docs/administration/maintenance-windows.html

Linux
Creating random (not empty, thin provisioned) files in Linux

Recently I have found the command that can generate random file in linux environment where non empty (thin provisioned) files are required for testing: todo: combine that command with parallel command (or parallel that in python).

VMware
Adding vCenter inventory into VCF Automation

4. From tree, expand vCenter and run workflow: Add a vCenter instance. It might be required to disable option “Do you want to create a session per user to the vCenter?” 5. Under Administration -> Inventory, select vCenter and verify if Datacenters folder is visible Now you can run workflows …