Remove Duplicate Lines: Write a Bash script that removes duplicate lines from a text file named "data.txt" and saves the result in a new file named "unique_data.txt". Code: #!/bin/bash # Remove duplicate lines from "temp.txt" and save to "unique_data.txt" sort -u temp.txt > uni...
Tips for composing effective emails avoiding misunderstandings with examples from the software development world. How to remove duplicate lines from files preserving their order How to remove duplicate lines of a file in Linux without sorting or changing their order (awk one-liner explained). ...
Combine sort and uniq using a pipe to remove duplicate lines sort random_order.txt | uniq Powered By Variables List all environment variables with set set Powered By Create a shell variable with name=value (no spaces around =) mydata=sales.csv Powered By Create a shell variable from...
the --- 1 --- indicated the number of lines in the File3.txt. Remember we would have a range of lines for File3.txt as well if it would have multiple lines. Howdid we identify the differences in the output? The+ meant the line was not present in the first file. Removeit...
") # Push Fruits+=('Watermelon') # Also Push Fruits=( ${Fruits[@]/Ap*/} ) # Remove by regex match unset Fruits[2] # Remove one item Fruits=("${Fruits[@]}") # Duplicate Fruits=("${Fruits[@]}" "${Veggies[@]}") # Concatenate lines=(`cat "logfile"`) # Read from file...
This method uses less memory than the mapfile method and works in bash 3 but it is slower for bigger files.lines_loop() { # Usage: lines_loop "file" count=0 while IFS= read -r _; do ((count++)) done < "$1" printf '%s\n' "$count" }...
/etc/bash.bashrc and the standard personal initialization file ~/.bashrc if the shell is interactive (see INVOCATION below). --login Equivalent to -l. --noediting Do not use the GNU readline library to read command lines when the shell is inter‐ ...
unset Fruits[2] # Remove one item Fruits=("${Fruits[@]}") # Duplicate Fruits=("${Fruits[@]}""${Veggies[@]}") # Concatenate lines=(`cat"logfile"`) # Read fromfile 迭代 foriin"${arrayName[@]}";doecho$idone 字典 定义
--init-file file --rcfile file Execute commands from file instead of the standard per- sonal initialization file ~/.bashrc if the shell is interactive (see INVOCATION below). --login Equivalent to -l. --noediting Do not use the GNU readline library to read command lines when the shell ...
20. Remove duplicate lines from a text file Description Notes: //...syntax of uniq...// $uniq [OPTION] [INPUT[OUTPUT]] The syntax of this is quite easy to understand. Here, INPUT refers to the input file in which repeated lines need to be filtered out and if INPUT isn't specified...