Commands using ls (517)
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Useful if a different user cannot access some directory and you want to know which directory on the way misses the x bit. Show Sample Output
2dir=$(pwd); while [ ! -z "$dir" ]; do ls -ld "$dir"; dir=${dir%/*}; done; ls -ld / -
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. Show Sample Output
2sudo ls -RFal / | gzip > all_files_list.txt.gz -
2find . -name '*png' -printf '%h\0' | xargs -0 ls -l --hide=*.png | grep -ZB1 ' 0$'
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the sed way to print line numbers Show Sample Output
2ls | sed "/^/=" | sed "N;s/\n/. /" -
displays the output of ls -l without the rest of the crud. pretty simple but useful.
2lsli() { ls -l --color "$@" | awk '{ for(i=9;i<NF;i++){ printf("%s ",$i) } printf("%s\n",$NF) }'; } -
specially usefull for sql scripts with insert / update statements, to add a commit command after n statements executed. Show Sample Output
2ls -l | sed "$(while (( ++i < 5 )); do echo "N;"; done) a -- COMMIT --" -
2ls -l | awk '{if (NR % 5 == 0) print "-- COMMIT --"; print}'
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2ls -d $(echo ${PATH//:/ }) > /dev/null
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Run this command when you are physically at the computer you wish to send pop-up messages to. Then when you ssh in to it, you can do this: echo "guess who?" > commander guess who? will then pop up on the screen for a few moments, then disappear. You will need to create the commander file first. I mess with my wife all the time with this. i.e. echo "You have given the computer a virus. Computer will be rendered useless in 10 seconds." > commander lol
2while : ; do if [ ! $(ls -l commander | cut -d ' ' -f5) -eq 0 ]; then notify-send "$(less commander)"; > commander; fi; done -
This function does a batch edition of all OOO3 Writer files in current directory. It uses sed to search a FOO pattern into body text of each file, then replace it to foo pattern (only the first match) . I did it because I've some hundreds of OOO3 Writer files where I did need to edit one word in each ones and open up each file in OOO3 gui wasn't an option. Usage: bsro3 FOO foo
2bsro3 () { P=`pwd`; S=$1; R=$2; ls *.odt > /dev/null 2>&1; if [[ $? -ne 0 ]]; then exit 1; fi; for i in *.odt; do mkdir ${P}/T; cd ${P}/T; unzip -qq "$P"/"$i"; sed -i "s/$S/$R/" ${P}/T/content.xml; zip -qq -r "$P"/"$i" *; cd ${P}; rm -rf ${P}/T; done; } -
You may also use the $(which foo) variant instead of backticks. I personnaly have an alias ll='ls -l'. Show Sample Output
2ls -l `which foo` -
This version is a bit more portable although it isn't extended as easily with '-type f' etc. On AIX the find command doesn't have -maxdepth or equivalent.
2ls | sed s#^#$(pwd)/# -
'data' is the directory to backup, 'backup' is directory to store snapshots. Backup files on a regular basis using hard links. Very efficient, quick. Backup data is directly available. Same as explained here : http://blog.interlinked.org/tutorials/rsync_time_machine.html in one line. Using du to check the size of your backups, the first backup counts for all the space, and other backups only files that have changed. Show Sample Output
2rsync -av --link-dest=$(ls -1d /backup/*/ | tail -1) /data/ /backup/$(date +%Y%m%d%H%M)/ -
A short variant if you have only one directory whit only audio files in it.
2ls -w 1 > list.m3u -
with zcat force option it's even simpler.
2zcat -f $(ls -tr access.log*) -
random file from files in directory
2ls -1 | shuf -n 1 -
2alias cd1='cd $( ls -lt | grep ^d | head -1 | cut -b 51- )'
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2ls -1d */
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Tells you everything you could ever want to know about all files and subdirectories. Great for package creators. Totally secure too. On my Slackware box, this gets set upon login:
LS_OPTIONS='-F -b -T 0 --color=auto'andalias ls='/bin/ls $LS_OPTIONS'which works great. Show Sample Output2lsr() { find "${@:-.}" -print0 |sort -z |xargs -0 ls $LS_OPTIONS -dla; } -
2ls -l `which gcc`
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Will use variable value (for variable $my_dir, in this case), an assign a default value if there is none. Show Sample Output
2ls ${my_dir:=/home} -
This will quickly display files last changed in a directory, with the newest on top. Show Sample Output
2ls -t | head -
* grep -i leaves only mp3 files (case insentitive) * sort -R randomizes list (may use GNU 'shuf' instead). * the sed command will add double quotes around each filename (needed if odd characters are present)
2ls | grep -i mp3 | sort -R | sed -e 's/.*/"&"/' | xargs mpg123 -
2ls|wc -l
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Uses the formatting of a man page to show an outline of its headers and sub-headers. Show Sample Output
2man ls | egrep "^([A-Z]| [A-Z])" - ‹ First < 3 4 5 6 7 > Last ›
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