fishScript.com Script con annotazioni in italiano e inglese

Shell scripting

Home >Shell scripting > How to get size or other file info in a shell script

Frequently, developers to get file information, as size, combine operative system(ls, du, bdf) with text manipulation(cut, grep, awk) commands.
For instance, in my program I need to get the size of myfile.txt file.

If from the unix prompt I just need to use ls:

$serverunix> ls -l
total 196
-rw-r--r--   1 migfsvm2   migfsvmg     16657 Mar 13 17:20 myfile.txt

Or du:

$serverunix> du -sk myfile.txt 

17      myfile.txt

On my program, I can just use the same commands but extracting only the output that I need, the size info, and put it in a variable.
With awk, I extract the 5th column displayed

### tested on unix HP
$serverunix>filename=myfile.txt
$serverunix>filesize=`ls -l ${filename} | awk '{print $5}'`
$serverunix>echo ${filesize}
	16657

With cut, I extract the first column:

### tested on unix HP
$serverunix>filename=myfile.txt
$serverunix>filesize=`du -sk ${filename} | cut -c1-2` 
$serverunix>echo ${filesize}
	17

Warning: include(ads/text468x15.html): failed to open stream: No such file or directory in D:\inetpub\webs\fishscriptcom\documents\view_document.php on line 131

Warning: include(): Failed opening 'ads/text468x15.html' for inclusion (include_path='.;C:\php\pear') in D:\inetpub\webs\fishscriptcom\documents\view_document.php on line 131

Tutorial

Executing a shell script [Unix]

Shell scripting passare parametri ad un programma [Shell scripting]

Cheking mandatory parameters have been passed to shell file, comparing strings in if construct and some other basics warming up with shell scripting [Shell scripting]

Estendere un logical volume e di un filesystem allocare più storage da riga di comando su Unix Hp [HP UX 11i]

Korn shell scripting If constructs AND, OR, &&, || syntax examples [Unix]

Function connecting to oracle getting results, executing query, verify db connection [Shell scripting]

Cheking parameters have been passed to shell file, comparing strings in if construct warming up with shell scripting [Shell scripting]

awk command line tutorial and examples sintax, functions, conditional constructs, text file operations [Unix]

How many processor and what kind of CPU extracting info from red hat system file /proc/cpuinfo [REDHAT]

sed command example on fixing errors and adding and removing blank lines [Unix]

Shell scripting eseguire controlli [Shell scripting]
Script

while do loop simple shell script [Shell scripting]

if e else strutture condizionali [Shell scripting]

Array valorizzazione e stampa [Shell scripting]

Hide user input on screen parameter of read command [Shell scripting]

Array in do while construct printing elements [Shell scripting]

Shell script automating oracle data pump schema export automatically export and compress database schemas in single separated dump files [Shell scripting]

Script per ricavare i nomi dei db (SID) dal file oratab [Unix]

Ciclo sul contenuto directory [Shell scripting]

If contruct check if a value is null or not [Unix]

Shell script extract items and looping example: issue dba statment for each db listed in oratab [Unix]

Passing parameters to shell script example sum of two numbers [Shell scripting]

Export and compress dump on the fly script to reduce storage need while using exp and imp Oracle utilities [Unix]

Pulire i file provenienti da ambieti dos/ windoes da caratteri sporchi dos2ux, dos2unix per eliminare i control M (^M) [Shell scripting]

Script for archiving and compressing folder and file utility example [Shell scripting]

How to get size or other file info in a shell script manipulating with cut or awk operative system commands output [Shell scripting]
Comandi

Privilegi su file o cartella (lettura, scrittura, execuzione) [Unix]

Cancellazione di una directory rm o rmdir [Unix]

Cd: cambiare directory [Unix]

Copiare un file in un altra cartella [Unix]

hostname [HP UX 11i]

uname visaulizza informazioni sul sistema operativo e la versione [HP UX 11i]

ipcs report stato dei processi [HP UX 11i]

getconf ricavare se si ha a disposizione un Kernel da 32-bit o 64-bit [HP UX 11i]

swlist -l patch determinare il software e le patch installate nella piattaforma [HP UX 11i]

who determinare gli utenti connessi [Unix]

shutdown [Unix]

env visualizzazione (e modifica) variabili dell'ambiente [Unix]

w attività degli utenti [Unix]

bdf visualizzare spazio disponibile [HP UX 11i]

df visualizzazione spazio disponibile [Unix]

Argomenti

Shell scripting

Cerca