printf

printf – store formatted string output in a variable Instead of the following printf ‘%st%st%st%sn’ ‘index’ ‘podcast’ ‘website’ ‘YouTube’ I want to store the printf output in a Results variable, how can I do this? Asked By: Porcupine || Source Bash (since 3.1), zsh (since 5.3) and ksh93 (since v- and u+m 2021-11-28) have an …

How do I pass hex characters to printf in a script command? How do I get printf to output hex characters when run from a script? Suppose I am at the prompt and type printf "x41x42" the output I get AB% However if I have a script containing that line i.e. cat test.sh produces printf …

Why does printing an array with @ using printf in bash only print the first element? I have an array snapshots=(1 2 3 4) When I run printf "${snapshots[*]}n" It prints as expected 1 2 3 4 But when I run printf "${snapshots[@]}n" It just prints 1 without a newline. My understanding is that accessing …

List all files in a directory, recursively, sorted by modification date The main answer of Sort the files in the directory recursively based on last modified date gives a method to list all files in a directory, recursively, sorted by modification date: find -printf "%TY-%Tm-%Td %TT %pn" | sort -n However it doesn’t list only …

Print Variable containing backslashes I have something like this: A=$(curl https://mysite.com) and the curl request returns the string "Hello World". When I now want to print A to the console using one of: echo "$A" printf ‘%s’ "$A" the dissappear and it just says "Hello World". What can I do to get "Hello World" on …

"ls" counterpart to "find" operator "-printf"? The find command has a handy -printf operator that prints user-specified metadata for each found file/folder. Is there such an option for the ls command? As an alternative, I can feed the list of filenames of interest to find instead of ls, but it seems like using a sledgehammer …

Why might I want to avoid such echo-like way of using `printf` when printing to stdout? I wrote the following script when trying to understand how printf works: #!/usr/bin/bash printf "Give me your three preferences.? " read p1 read p2 read p3 printf "%sn" "${p1}" "${p2}" "${p3}" printf "Just the same as this, n" printf …

How to use argument twice in printf in shell? printf %s%s one two prints onetwo but I would like oneonetwotwo How can I do that? Asked By: theonlygusti || Source In zsh: printf ‘%1$s%1$s’ one two Where %n$s is like %s except that it uses the nth argument instead of the next one like the …

printf "%.3f" ${variable with newlines} – error with n Like HERE I have a file.csv with numbers in quotes: "0.2" "0.3339" "0.111111" To round the number (3 decimals) this solutions works great: printf "%.03fn" $(sed ‘s/"//g’ file.csv) But now I want to store sed ‘s/"//g’ file.csv as a variable var_sed=$(sed ‘s/"//g’ file.csv); printf "%.03fn" ${var_sed} …

Rounding many values in a csv to 3 decimals (printf ?) I have a paste command like this paste -d , file1.csv file2.csv file3.csv And file2.csv contains numbers like this 0.2 0.3339 0.111111 I want the values in file2.csv having 3 decimals like this: 0.200 0.334 0.111 For one value this is working: printf "%.3f" …

first character goes to last when formatting XYZ columns with printf awk I have a file with 7 columns and I want to get the first 4 and format them with awk. When I use awk without formatting it works however when I put it with printf it happens that the first character of the …

Why I can pipe echo into bc, but I can't do the same with printf? I can pipe echo into bc. But I cannot do the same with "printf": it gives syntax error. ❯ echo "100-5" | bc 95 ❯ printf "%s" "100-5" | bc (standard_in) 1: syntax error Asked By: robertspierre || Source Just …

How to convert seconds to hh:mm:ss.ms when getting difference between 2 times I performed a calculation that converts current timestamp giving milliseconds as well using perl command such as below: perl -MTime::HiRes=time -MPOSIX=strftime -e ‘ $now = int(time() * 1000); printf "%s.%03dn", strftime("%H:%M:%S", localtime(int($now/1000))), ($now % 1000);’ From the above I want to convert the …

Shell function to center its first argument In the nano text editor, I can pipe the selection into a command, and I quite often need to center text, so I came up with the following code center() { str=$1 # Strip leading and trailing whitespace from the string str=$(echo "$str" | sed -e ‘s/^[[:space:]]*//’ -e …

How to count the number of lines per file in a directory, then create summary of number of files with n lines I’m trying to create a summary of how many files in a directory have n number of lines in them. I’m using wc -l * | sort to print out the number of …

Is it safe to snprintf with output to NULL and size 0? Is it safe to call snprintf(NULL, 0, "…", …)? I can also ask in other way: Does snprintf write the NUL char if size is 0? The example in Linux man-pages manpage printf(3) provides an example that does that, but in the rest of …

generate a report of sales with awk I trying to create a report of sales for each store using an awk script. The dataset is in csv format and there are 45 stores. Example of the data is something like this: Store,Store_name,Date,Year,Weekly_Sales,Holiday_Flag,Temperature,Fuel_Price,CPI,Unemployment 1,Store1,05-02-2010,2010,1643690.9,No,42.31,2.572,211.0963582,8.106 1,Store1,12-02-2010,2010,1641957.44,Yes,38.51,2.548,211.2421698,8.106 … … 45,Store45,12-10-2012,2012,734464.36,No,54.47,4,192.3272654,8.667 45,Store45,19-10-2012,2012,718125.53,No,56.47,3.969,192.3308542,8.667 I’m trying to group the stores and …

How to do formatted printing with jq? jq has built-in ability to convert numbers to string or concatenate strings. How can I format strings inside jq similar to printf like padding (%4s). For example, how can I force number to occupy 10 char spaces with left alignment? echo ‘{"title" : "A sample name", "number" : …

repeating a character using printf and appending a newline at the end In order to repeat a character N times, we could use printf. E.g to repeat @ 20 times, we could use something like this: N=20 printf ‘@%.0s’ $(seq 1 $N) output: @@@@@@@@@@@@@@@@@@@@ However, there is no newline character at the end of that …

How can I modify -printf "%s n" in find command to give me size in MB and not bytes? I am writing a simple helper function to show a sizes of the files: This is the code I have so far: find . -type f -size +10M -printf “%f -> %s Bn” The output I …