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awk, bash, curl, find, grep, Linux, sed
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Functions

Commands using ls from sorted by
Terminal - Commands using ls - 470 results
BACKUP_FILE_SIZE=`eval ls -l ${BACKUP_FILE} | awk {'print $5'}`; if [ $BACKUP_FILE_SIZE -le 20 ]; then echo "its empty"; else echo "its not empty"; fi
2009-12-29 08:34:37
User: Redrocket
Functions: awk echo ls
-2
Up
Down
Check if file is greater than 20 bytes, such as an empty gzip archive

If you gzip an empty file it becomes 20 bytes. Some backup checks i do check to see if the file is greater than zero size (-s flag) but this is no good here. Im sure someone has a better check than me for this? No check to see if file exists before checking it's size.

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find dir -size -1024k -type f | xargs -d $'\n' -n1 ls -l | cut -d ' ' -f 5 | sed -e '2,$s/$/+/' -e '$ap' | dc
2009-12-28 04:23:01
User: zhangweiwu
Functions: cut dir find ls sed xargs
Tags: size sum
1
Up
Down
find out how much space are occuipied by files smaller than 1024K

The command gives size of all files smaller than 1024k, this information, together with disk usage, can help determin file system parameter (e.g. block size) or storage device (e.g. SSD v.s. HDD).

Note if you use awk instead of "cut| dc", you easily breach maximum allowed number of records in awk.

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find . -name '*png' -printf '%h\0' | xargs -0 ls -l --hide=*.png | grep -ZB1 ' 0$'
2009-12-23 18:50:35
User: unixmonkey7586
Functions: find grep ls xargs
2
Up
Down
List folders containing only PNGs
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sudo ls -RFal / | gzip > all_files_list.txt.gz
2009-12-14 21:40:56
User: roryokane
Functions: gzip ls sudo
2
Up
Down
Write a listing of all directories and files on the computer to a compressed file.

This command is meant to be used to make a lightweight backup, for when you want to know which files might be missing or changed, but you don't care about their contents (because you have some way to recover them).

Explanation of parts:

"ls -RFal /" lists all files in and below the root directory, along with their permissions and some other metadata.

I think sudo is necessary to allow ls to read the metadata of certain files.

"| gzip" compresses the result, from 177 MB to 16 MB in my case.

"> all_files_list.txt.gz" saves the result to a file in the current directory called all_files_list.txt.gz. This name can be changed, of course.

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dir=$(pwd); while [ ! -z "$dir" ]; do ls -ld "$dir"; dir=${dir%/*}; done; ls -ld /
2009-12-14 14:38:11
User: hfs
Functions: dir ls
2
Up
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Show permissions of current directory and all directories upwards to /

Useful if a different user cannot access some directory and you want to know which directory on the way misses the x bit.

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perl -lne 'print for /url":"\K[^"]+/g' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q)
2009-12-14 00:51:54
User: sputnick
Functions: ls perl sed
Tags: perl firefox regex json substitution
0
Up
Down
Extract all urls from last firefox sessionstore used in a portable way.

If you want all the URLs from all the sessions, you can use :

perl -lne 'print for /url":"\K[^"]+/g' ~/.mozilla/firefox/*/sessionstore.js

Thanks to tybalt89 ( idea of the "for" statement ).

For perl purists, there's JSON and File::Slurp modules, buts that's not installed by default.

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ls | xargs du -sh
2009-12-10 15:58:05
User: jyro
Functions: du ls xargs
-4
Up
Down
List the size (in human readable form) of all sub folders from the current location
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grep -oP '"url":"\K[^"]+' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q)
2009-12-09 20:34:32
User: sputnick
Functions: grep ls sed
Tags: sed grep firefox pcre
0
Up
Down
Extract all urls from the last firefox sessionstore.js file used.

Require "grep -P" ( pcre ).

If you don't have grep -P, use that :

grep -Eo '"url":"[^"]+' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q) | cut -d'"' -f4
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ls -l `locate your_search_here`
2009-11-27 05:53:46
User: tjcertified
Functions: ls
-5
Up
Down
Find files and format them in detailed list

This command lists extended information about files, i.e. whether or not it is a true file or link, who owns it, etc. without having to 'ls' from the specific directory. If you know the filename, but not the location, this helps with finding other information about the file. It can be truncated by creating an alias for 'ls -l'. The sample output shows difference in regular locate vs. ls + locate.

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ls -la /dev/disk/by-id/usb-*
2009-11-25 16:02:06
User: casidiablo
Functions: ls
Tags: hardware usb udev devices
2
Up
Down
Get names of files in /dev, a USB device is attached to

This command lists the names of your USB devices connected and what file in /dev they are using. It's pretty useful if you don't have an automount option in your desktop or you don't have any graphical enviroment.

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ls *[^p][^a][^t]* ; # or shopt -s extglob; ls !(*pattern*)
2009-11-25 01:19:02
User: unixmonkey7109
Functions: ls
Tags: ls grep
-3
Up
Down
List files that DO NOT match a pattern

no need to use grep.

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ls | grep -vi pattern
2009-11-24 20:39:53
User: haivu
Functions: grep ls
Tags: ls grep
-1
Up
Down
List files that DO NOT match a pattern
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ls -F | sed -n 's/@$//p'
2009-11-23 16:46:58
User: putnamhill
Functions: ls sed
-2
Up
Down
List all symbolic links in current directory
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ls -l `ls -l |awk '/^l/ {print $8}'`
2009-11-23 16:02:18
User: yooreck
Functions: awk ls
-3
Up
Down
List all symbolic links in current directory

ls -l may vary depending on operating system, so "print $8" may have to be changed

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ls -d .*
2009-11-23 15:58:52
User: yooreck
Functions: ls
Tags: egrep ls dotfiles
2
Up
Down
Find all dot files and directories
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ls -l | awk '$5 > 1000000' | sort -k5n
2009-11-20 21:18:45
User: cfajohnson
Functions: awk ls sort
1
Up
Down
Show sorted list of files with sizes more than 1MB in the current dir
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for f in $(ls *.xml.skippy); do mv $f `echo $f | sed 's|.skippy||'`; done
2009-11-19 21:36:26
User: argherna
Functions: ls mv sed
Tags: sed ls mv for
-2
Up
Down
Remove an unnecessary suffix from a file name for all files in a directory

For this example, all files in the current directory that end in '.xml.skippy' will have the '.skippy' removed from their names.

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video=$(ls /tmp | grep -e Flash\w*); ffmpeg -i /tmp/$video -f mp3 -ab 192k ~/ytaudio.mp3
2009-11-19 09:25:10
User: aperson
Functions: grep ls
-2
Up
Down
Script to rip the audio from the youtube video you have open in firefox

Must have the video open and fully loaded.

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function lsless() { ls "$@" | less; }
2009-11-13 17:28:06
User: argherna
Functions: ls
Tags: less ls function
-2
Up
Down
Pipe ls output into less

This is useful for paging through long directories, mulitple directories, etc. I put this in my ~/.bash_aliases file and alias 'lsl' to it.

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slice(){ cut -c$((${#1}+1))-; }; ls -l | slice "-rw-r--r--"
2009-11-12 22:50:21
User: sputnick
Functions: cut ls
0
Up
Down
slice a fixed number of characters from the output of a command, where the width of the slice is the number of characters in $slice
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slice="-rw-r--r-- "; ls -l | cut -c $(echo "$slice" | wc -c)-
2009-11-12 22:24:31
User: bartonski
Functions: cut echo ls wc
0
Up
Down
slice a fixed number of characters from the output of a command, where the width of the slice is the number of characters in $slice
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ls -al
2009-11-12 12:27:32
User: eastwind
Functions: ls
-11
Up
Down
show the last modified date on directory and file

it does provide much more information , the owner , group , the size in byte , and the last modified time a file or directory was

ls -al : list all in long format

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ls -a | egrep "^\.\w"
2009-11-11 18:19:56
User: kulor
Functions: egrep ls
Tags: egrep ls dotfiles
-2
Up
Down
Find all dot files and directories

trying to copy all your dotfiles from one location to another, this may help

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ls -1rSA | tail
2009-10-27 15:34:59
User: rbossy
Functions: ls
-5
Up
Down
Get the 10 biggest files/folders for the current direcotry

This will only work on files since ls won't tell the size of a directory contents.

Note that the first switch is the digit one, not the letter ell.

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pushd .> /dev/null; cd /; for d in `echo $OLDPWD | sed -e 's/\// /g'`; do cd $d; echo -n "$d "; ls -ld .; done; popd >/dev/null
2009-10-22 12:32:11
User: syladmin
Functions: cd echo ls sed
Tags: permissions
0
Up
Down
Show current folder permission recursively from /, useful for debugging ssh key permission

Can easily be scripted in order to show permission "tree" from any folder. Can also be formated with

column -t

{ pushd .> /dev/null; cd /; for d in `echo $OLDPWD | sed -e 's/\// /g'`; do cd $d; echo -n "$d "; ls -ld .; done; popd >/dev/null ; } | column -t

from http://www.commandlinefu.com/commands/view/3731/using-column-to-format-a-directory-listing

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