This is especially useful for nix installed jdks.
java -XshowSettings:properties -version 2>&1 > /dev/null | grep 'java.home'du -sh /* | sort -rh grep -rl "my-search-string" /etc/# vgs
# lvs
pvcreate /dev/sdb
vgextend vg_openlab /dev/sdb
lvextend -l +100%FREE /dev/vg_openlab/lv_root
resize2fs /dev/vg_openlab/lv_root# use sudo if files may be under permission protected directories
# 2> /dev/null removes errors like 'do not have permission' while traversing the filesystem
find / -name my_file.txt 2> /dev/nullThis one is really useful in cases like the following. Imagine a cloudera cluster where tons of processes are running and multiple instances have been run. This is what you could be faced with:
[root@sl-019895 ~]# ls /var/run/cloudera-scm-agent/process/The result:
1546336091-ranger-RANGER_ADMIN-SetupRangerCommand 1546338486-atlas-ATLAS_SERVER
1546336099-oozie-OOZIE-SERVER-createdbtables 1546338531-atlas-ATLAS_SERVER
1546336185-ranger-RANGER_TAGSYNC 1546338545-atlas-ATLAS_SERVER
1546336187-ranger-RANGER_USERSYNC 1546338560-atlas-ATLAS_SERVER
1546336189-ranger-RANGER_ADMIN 1546338575-atlas-ATLAS_SERVER
1546336236-ranger-RANGER_ADMIN-SetupPluginServices 1546338592-atlas-ATLAS_SERVER
1546336321-oozie-OOZIE-SERVER-upload-sharelib 1546338606-atlas-ATLAS_SERVER-InitializeAtlasRole
1546336390-oozie-OOZIE_SERVER 1546338615-atlas-ATLAS_SERVER
1546336394-hue-HUE_SERVER 1546338660-atlas-ATLAS_SERVER-InitializeAtlasRole
1546336396-hue-KT_RENEWER 1546338698-atlas-ATLAS_SERVER-InitializeAtlasRole
1546336398-hue-HUE_LOAD_BALANCER 1546338706-atlas-ATLAS_SERVER
1546336425-atlas-ATLAS_SERVER-InitializeAtlasRole 1546338744-atlas-ATLAS_SERVER-InitializeAtlasRole
1546336474-atlas-ATLAS_SERVER 1546338752-atlas-ATLAS_SERVER
1546336739-ranger-RANGER_TAGSYNC 1546338766-atlas-ATLAS_SERVER
1546336741-ranger-RANGER_USERSYNC 1546338814-atlas-ATLAS_SERVERNow how to get the current Atlas process dir?
Utilizing ls with its flags 1dtr and a catch all * on the pathname, we can have one result per line, sorted and restricted to directories.
With tail -1 we take the last (most recent in this case) entry, which would correspond the the process dir we were looking for.
The final command comes together like this:
export ATLAS_PROCESS_DIR=$(ls -1dtr /var/run/cloudera-scm-agent/process/*ATLAS_SERVER | tail -1)This allows to work with the ugly directory path much more conveniently.
lsof -i :<port_number>How to fix E: Release file for http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet (invalid for another 9h 14min 16s). Updates for this repository will not be applied. error
This might happen if some systemtime issues occur.
# example with a dockerfile
RUN apt-get -o Acquire::Max-FutureTime=86400 update -y && apt-get install -y ...
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~update-java-alternatives --list
update-java-alternatives --set [JDK/JRE name e.g. java-8-oracle]Comes in handy, if, for example, you need to develop an ansible script and need different stages.
docker commit <container id or name>
# now the image needs a name
docker tag <IMAGE_ID> <IMAGE_NAME>
# now a container can be started with:
docker run <IMAGE_NAME> systemctl show -P FragmentPath cron-daily.service
# result: /lib/systemd/system/cron-daily.serviceThe main idea here is to provide a quick and easy way to dump the project into a LLM.
NOTE: ssh -Y might be necessary if using it on a remote machine.
#!/bin/bash
# Default search path is the current working directory
SEARCH_PATH="$(pwd)"
# Default list of file names/types and directories to ignore
IGNORE_LIST=(".DS_Store" "LICENSE" "*.lock" "__pycache__" "__init__.py" "ruff.toml" "*.nix")
# Function to join array elements
join_by() {
local IFS="$1"
shift
echo "$*"
}
# Parse command line arguments
while getopts ":e:" opt; do
case ${opt} in
e)
# Add custom ignore patterns from -e option
IGNORE_LIST+=("$OPTARG")
;;
\?)
echo "Invalid option: $OPTARG" 1>&2
exit 1
;;
:)
echo "Invalid option: $OPTARG requires an argument" 1>&2
exit 1
;;
esac
done
shift $((OPTIND - 1))
# Check if a path argument is provided
if [ "$#" -eq 1 ]; then
SEARCH_PATH="$1"
elif [ "$#" -gt 1 ]; then
echo "Usage: $0 [-e pattern_to_ignore] [path_to_search]" 1>&2
exit 1
fi
# Convert IGNORE_LIST to fd exclude patterns
EXCLUDE_PATTERNS=$(join_by , "${IGNORE_LIST[@]}")
# Execute fd with the constructed exclude patterns and search path
TREE_OUTPUT=$(fd --exclude "{$EXCLUDE_PATTERNS}" . "$SEARCH_PATH" | tree -a --fromfile)
# Copy the tree output to the clipboard
echo "$TREE_OUTPUT" | xclip -selection clipboard
# For macOS, use: echo "$TREE_OUTPUT" | pbcopy
# Extract file paths from the tree output
FILE_PATHS=$(fd --exclude "{$EXCLUDE_PATTERNS}" . "$SEARCH_PATH")
# Initialize an empty string to hold the file contents
FILE_CONTENTS=""
# Loop through each file path, read its contents, and append to FILE_CONTENTS
while IFS= read -r file_path; do
# Check if the path is a file and not a directory
if [ -f "$file_path" ]; then
# Append the separator and file contents to FILE_CONTENTS
printf "\n\n==============\n\nFile Contents for:\n%s\n\nvvvvvvvvvvvvvv\n\n\n" "$file_path" >>temp_file
cat "$file_path" >>temp_file
FILE_CONTENTS+=$(<temp_file)
true >temp_file
fi
done <<<"$FILE_PATHS"
FILE_CONTENTS+="$TREE_OUTPUT"
echo "$FILE_CONTENTS"
# Copy the file contents to the clipboard
echo "$FILE_CONTENTS" | xclip -selection clipboard
rm temp_file