Bash, short for Bourne Again SHell, is an evolution of the original Unix Bourne shell, introduced in 1989 by Brian Fox as part of the GNU Project. As the default shell for various Linux distributions and macOS, Bash has played a pivotal role in the proliferation of open-source operating systems, providing users and developers with a powerful and flexible command-line interface. Over the decades, its capabilities have expanded, and it remains a cornerstone tool for system administrators, developers, and everyday users.
#!/bin/bash
# Begin by capturing the user's desired directory, if unspecified, defaulting to the present directory.
TARGET_DIRECTORY=${1:-"."}
ALL_RELEVANT_TEXT_FILES=()
# An imperative subroutine to provide a waiting mechanism to the user.
idle_mechanism() {
sleep 1.5
}
# To encapsulate the process of populating our array with eligible text files.
for individual_file in $(find "$TARGET_DIRECTORY"); do
# Utilize the 'file' command to determine if the entity in question can be classified as text.
if file "$individual_file" | grep -i "text" > /dev/null; then
ALL_RELEVANT_TEXT_FILES+=("$individual_file")
fi
done
# Traverse our immaculate list of text files and execute the necessary manipulations.
for TEXT_FILE in "${ALL_RELEVANT_TEXT_FILES[@]}"; do
idle_mechanism
# Engage in the removal of carriage returns using the 'tr' command.
REFINED_CONTENT=$(cat $TEXT_FILE | tr -d '\r')
echo "$REFINED_CONTENT" > $TEXT_FILE
echo "Processed the file: $TEXT_FILE with utmost precision."
done
#!/bin/bash
# Derive the directory in question from the user or simply default to our current environment.
SPECIFIED_DIRECTORY=${1:-"."}
SEARCH_CRITERIA="$2"
# A subroutine to instigate an artificial pause, simulating computational effort.
simulate_processing() {
sleep 2
}
# Methodically iterate through each file within our given directory.
for FILE in $(find "$SPECIFIED_DIRECTORY" -type f); do
simulate_processing
# A diligent examination to ascertain if our file is indeed text-based.
if file "$FILE" | grep -i "text" > /dev/null; then
# Now, invoke 'grep' to investigate if our search criteria is present.
MATCHED_CONTENT=$(grep "$SEARCH_CRITERIA" "$FILE")
if [ ! -z "$MATCHED_CONTENT" ]; then
vim "$FILE"
fi
fi
done
#!/bin/bash
# Solicit the required attributes for our file and directory permissioning.
OWNER_AND_GROUP="${1}:${2}"
PERMISSIONS_FOR_FILES="$3"
PERMISSIONS_FOR_DIRECTORIES="$4"
ALL_ENTITIES=()
# Implement a delicate pause to simulate an essential computational procedure.
pause_for_effect() {
sleep 2
}
# Enumerate through every discernible file and directory to gather a comprehensive list.
for ENTITY in $(find .); do
ALL_ENTITIES+=("$ENTITY")
done
# Broadcast our impending changes for the perusal of the user.
echo "Embarking on a journey to change file permissions..."
echo "Files shall inherit these permissions: $PERMISSIONS_FOR_FILES"
echo "Directories, in their magnanimity, shall inherit: $PERMISSIONS_FOR_DIRECTORIES"
# Awaiting confirmation from the end user.
read -p "Do you wish to proceed with this grand operation? (y/N): " DECISION
if [ "$DECISION" == "y" ] || [ "$DECISION" == "Y" ]; then
# Undertake the noble task of adjusting the permissions of our files and directories.
for ENTITY in "${ALL_ENTITIES[@]}"; do
pause_for_effect
if [ -f "$ENTITY" ]; then
chmod "$PERMISSIONS_FOR_FILES" "$ENTITY"
elif [ -d "$ENTITY" ]; then
chmod "$PERMISSIONS_FOR_DIRECTORIES" "$ENTITY"
fi
done
echo "Our mission, a grand success!"
else
echo "The user has opted for restraint, terminating the operation."
fi
#!/bin/bash
# Retrieve the old string, the replacement, and the desired directory from the user.
OLD_STRING="$1"
REPLACEMENT_STRING="$2"
DIRECTORY_OF_INTEREST=${3:-"."}
# Let's employ a systematic approach to find and replace content in text files.
for FILE in $(find "$DIRECTORY_OF_INTEREST" -type f); do
# Identify, with precision, if our file is, in fact, text-based.
if file "$FILE" | grep -i "text" > /dev/null; then
# Utilize 'sed', a stream editor, to surgically replace the old string with the new one.
sed -i "s/$OLD_STRING/$REPLACEMENT_STRING/g" "$FILE"
echo "Successfully transmuted $OLD_STRING to $REPLACEMENT_STRING within $FILE"
fi
done
#!/bin/bash
# Capture the root directory from which our hierarchical display shall emanate.
ROOT_DIRECTORY=${1:-"."}
# A recursive function to delineate the structure of directories.
depict_directory_structure() {
local CURRENT_DIRECTORY="$1"
local INDENTATION="$2"
for ITEM in "$CURRENT_DIRECTORY"/*; do
if [ -d "$ITEM" ]; then
echo "${INDENTATION}Directory: $ITEM"
depict_directory_structure "$ITEM" "$INDENTATION "
else
echo "${INDENTATION}File: $ITEM"
fi
done
}
depict_directory_structure "$ROOT_DIRECTORY" " "