You want to install asdf in a new (k)ubuntu installation but some of the plugins are not installed (python).
Make sure you install the dependencies first
sudo apt install -y build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python3-openssl git
You are trying to install the latest ruby version using asdf version manager with
asdf plugin-add ruby
asdf install ruby latest
but that fails with messages like
*** Following extensions are not compiled:
psych:
Could not be configured. It will not be installed.
Check /tmp/ruby-build.20250826161307.2841030.HGJPXU/ruby-3.4.5/ext/psych/mkmf.log for more details.
zlib:
Could not be configured. It will not be installed.
Check /tmp/ruby-build.20250826161307.2841030.HGJPXU/ruby-3.4.5/ext/zlib/mkmf.log for more details.
BUILD FAILED (Ubuntu 24.04 on x86_64 using ruby-build 20250724)
Try to install the missing packages with:
sudo apt-get install libyaml-dev
To merge multiple pdf files using the most current qpdf (instead of the older pdftk) you can use the following:
qpdf --empty --pages file1.pdf file2.pdf file3.pdf -- output.pdfSome useful commands to manage print jobs
| lpstat -p -d | To get a list of available printers, along with their status |
| lpstat -a | To check the status of all connected printers, including job numbers |
| cancel job-id or lprm job-id | To cancel a print job |
| lpmove job-id newprinter | To move a print job to new printer |
Taken from Introduction to Linux course (LFS101) from Linux Foundation here
To list the currently loaded modules in NGINX you can use the following:
nginx -V 2>&1 | grep -oP '(?<=--with-http_)[a-zA-Z0-9_]+'
You can use the following xdpyinfo command
xdpyinfo | grep dim
dimensions: 3840x3673 pixels (1016x971 millimeters)
You have an LDAP entry with an attribute that consists of json entries, and you would like to use ldapsearch to filter on a json item condition.
So having the attribute
mobileIDAuthenticator: {“creationDateTime”:”2023-08-28T14:53:29.061Z”,”state”:”ENABLED”,”mobileNumber”:”+411111111″,”mobileSerialNumber”:”AAAAAAAAAAAAA”}
you would like to filter on the state item.
you can use the following syntax:
ldapsearch -LLL -H "ldaps://domain.com:1636" -D "cn=Directory Manager" -w $LDP -o ldif_wrap=no -c -vvvv -b "ou=persons,dc=domain,dc=com" -s sub "(mobileIdAuthenticator=state eq 'ENABLED')" uid mobileIDAuthenticator You have an attribute in LDAP that might be a long line (ie a json array that contains many records like logins for example)
loginHistory: [{"lastLoginDate":"20250107094531.782Z","loginModule":"1"},{"lastLoginDate":"20241202075005.298Z","loginModule":"1"},{"lastLoginDate":"20241129143412.785Z","loginModule":"1"},{"lastLoginDate":"20241129103347.029Z","loginModule":"1"},{"lastLoginDate":"20240920105718.171Z","loginModule":"2"}]
But you want to return it in one line for further processing (ie counting the number of times in a year).
You can use the -o ldif_wrap=no option in your ldapsearch like
ldapsearch -LLL -H "ldaps://ldap.com:1636" -o ldif_wrap=no -D "cn=User" -w $LDP -b "ou=people,dc=domain,dc=com" -s sub "(mail=usernname@domain.com)" uid loginHistory
To return all attributes from LDAP using ldapsearch you can use both “*” for user and “+” for operational attributes
ldapsearch -LLL -H "ldaps://url:1636" -D "cn=Directory Manager" -w $LDP -b "ou=entity,dc=domain,dc=com" -s sub "(&(attr_filter1=SOMETHING)(attr_filter2=ELSE))" "*" "+"
You are trying to do PITR recovery for a specific time, but the restore fails with something similar to the following message
FATAL: recovery ended before configured recovery target was reachedThis seems to be caused by a feature/bug that causes this error when there are no transactions between the backups, as explained in more detail here