Showing posts with label linux. Show all posts
Showing posts with label linux. Show all posts
Monday, December 2, 2024

How to use rsync between two servers

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For example, to syncronize two servers so they get identical file structures:  Source server: server1.oric.no  Destination server: server2.o...
Thursday, July 27, 2023

How to list the contents of a folder in a tree-like fashion in Linux

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Use the tree command: cd /sw/oracle/admin tree -L 2 . ├── cdb │   ├── adump │   ├── dpdump │   ├── log │   ├── pfile │   └── xdb_wallet ├...
Thursday, June 15, 2023

How to list the content of a folder and get total size summary of the parent folder at the end

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To list the size of all folders and get a summery at the end, use the --max-depth=1 switch with the du command. In the listing below, I ...
Friday, April 21, 2023

How to get verbose output in a call to mailx

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Use the -vvv flag to debug your call to mailx: root # echo "Test message" | mailx -S smtp="smtp.oric.no" -vvv -s ...
Sunday, February 19, 2023

How to identified active files/executables when using opatch to deinstall software

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During a opatch rollback operation, we saw the following error message in the opatch logfile: [Feb 19, 2023 2:29:51 PM] [INFO] Prerequi...
Saturday, February 18, 2023

How to prevent sed to destroy your symlinks

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Because of EBS, we have a subdirectory in our $TNS_ADMIN which has the following name PDB1_test1.oric.no In other words, the files listen...
Tuesday, February 14, 2023

Error fetching the value from a shell script executed by root, when doing "su - oracle"

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Problem: Inside a new bash shell session, executed as user "oracle", like this: su - oracle <<! instructions here ! I ...
Friday, January 6, 2023

How to solve script error $'\r': command not found syntax error: unexpected end of file

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when trying to execute a script from root, like the following: su - oracle -c "/tmp/set_params.sh" You may see errors like the...
Wednesday, November 16, 2022

How to log entire output from a shell script

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I have recently used exec to send all output from a bash script to a designated logfile. For example, if you have a complex script which...
Tuesday, July 5, 2022

How to list all nfs mountpoints

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findmnt -t nfs TARGET SOURCE FSTYPE OPTIONS /u01 pzl2ora1:/Oracle/software/pzh0oric/u01 nf...
Tuesday, December 21, 2021

How to work around error [INS-08101] Unexpected error while executing the action at state: ‘supportedOSCheck’

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Thanks so much to Martin Berger for his blog post showing how to work around an error that shows up when you attempt to install Oracle 19...
Friday, December 4, 2020

How to view the contens of a zip file without extracting it

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Method 1: zip -sf myzipfile.zip Method 2: zipinfo myzipfile.zip
Thursday, October 15, 2020

How to select a specific line number using awk

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The file clonetext.txt contains: Clone Volume: true Clone Parent server Name: myserver1-cluster49 ...
Monday, August 3, 2020

How to find offending process when getting error umount.nfs: /data1: device is busy

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As root, use lsof ("list open files"): [root@myserver /home/oracle]# lsof | grep '/data1' extract 14041 oracl...
Tuesday, February 25, 2020

How to debug an ssh connection

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ssh -X -v myserver.mydomain.com You can also use -vv and -vvv for more detailed debug information.
Sunday, May 26, 2019

How to display Linux kernel and version information on debian platforms

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Use the lsb (Linux Standard Base) utility: lsb_release -a Output: No LSB modules are available. Distributor ID: Ubuntu Description: Ubunt...