Commands using sort (800)

  • Sort and count subjects of emails stuck in Exim queue


    1
    grep -R Subject /var/spool/exim/input/ | sed s/^.*Subject:\ // | sort | uniq -c | sort -n > ~/email_sort.$(date +%m.%d.%y).txt
    unixmonkey27702 · 2011-11-24 14:13:29 3
  • Show total size of each subdirectory, broken down by KB,MB,GB,TB


    1
    du --max-depth=1 | sort -nr | awk ' BEGIN { split("KB,MB,GB,TB", Units, ","); } { u = 1; while ($1 >= 1024) { $1 = $1 / 1024; u += 1 } $1 = sprintf("%.1f %s", $1, Units[u]); print $0; } '
    threv · 2011-12-08 17:43:09 4
  • One line Perl Script to determine the largest file sizes on a Linux Server

    This one line Perl script will display the smallest to the largest files sizes in all directories on a server. Show Sample Output


    1
    du -k | sort -n | perl -ne 'if ( /^(\d+)\s+(.*$)/){$l=log($1+.1);$m=int($l/log(1024)); printf ("%6.1f\t%s\t%25s %s\n",($1/(2**(10*$m))),(("K","M","G","T","P")[$m]),"*"x (1.5*$l),$2);}' | more
    Q_Element · 2012-02-07 15:49:19 10
  • Displays user-defined ps output and pidstat output about the top CPU or MEMory users.

    It grabs the PID's top resource users with $(ps -eo pid,pmem,pcpu| sort -k 3 -r|grep -v PID|head -10) The sort -k is sorting by the third field which would be CPU. Change this to 2 and it will sort accordingly. The rest of the command is just using diff to display the output of 2 commands side-by-side (-y flag) I chose some good ones for ps. pidstat comes with the sysstat package(sar, mpstat, iostat, pidstat) so if you don't have it, you should. I might should take off the timestamp... :| Show Sample Output


    1
    for i in $(ps -eo pid,pmem,pcpu| sort -k 3 -r|grep -v PID|head -10|awk '{print $1}');do diff -yw <(pidstat -p $i|grep -v Linux) <(ps -o euser,pri,psr,pmem,stat -p $i|tail);done
    bob_the_builder · 2012-02-16 20:54:32 23
  • Top 20 commands in your bash history


    1
    sed -e 's/[;|][[:space:]]*/\n/g' .bash_history | cut --delimiter=' ' --fields=1 | sort | uniq --count | sort --numeric-sort --reverse | head --lines=20
    WissenForscher · 2012-02-17 23:34:16 5
  • List files in directory tree with newest last


    1
    find <directory> -type f -printf "%T@\t%p\n"|sort -n|cut -f2|xargs ls -lrt
    rik · 2012-03-02 12:51:06 3
  • identify NEEDED sonames in a path

    This works in combination with http://www.commandlinefu.com/commands/view/10496/identify-exported-sonames-in-a-path as it reports the NEEDED entries present in the files within a given path. You can then compare it with the libraries that are exported to make sure that, when cross-building a firmware image, you're not bringing in dependencies from the build host. The short version of it as can be seen in the same output is scanelf -RBnq -F "+n#f" $1 | tr ',' '\n' | sort -u Show Sample Output


    1
    scanelf --nobanner --recursive --quiet --needed --format "+n#F" $1 | tr ',' '\n' | sort -u
    Flameeyes · 2012-03-29 18:30:45 3
  • Recursively find top 20 largest files (> 1MB) sort human readable format

    from my bashrc ;)


    1
    find . -mount -type f -printf "%k %p\n" | sort -rg | cut -d \ -f 2- | xargs -I {} du -sh {} | less
    bashrc · 2012-03-30 07:37:52 3
  • List all files in current dir and subdirs sorted by size

    or tree -ifsF --noreport .|sort -n -k2|grep -v '/$' (rows presenting directory names become hidden)


    1
    tree -ifs --noreport .|sort -n -k2
    knoppix5 · 2012-05-04 09:18:39 6
  • Top 15 processes with the largest number of open files

    See the summary. Show Sample Output


    1
    lsof +c 15 | awk '{print $1}' | sort | uniq -c | sort -rn | head
    SEJeff · 2012-05-25 16:31:46 3
  • du and sort to find the biggest directories in defined filesystem

    This command give a human readable result without messing up the sorting.


    1
    for i in G M K; do du -hx /var/ | grep [0-9]$i | sort -nr -k 1; done | less
    jlaunay · 2012-06-26 22:57:17 6
  • Read a tcpdump file and count SYN packets to port 80, Order column by destination.


    1
    tcpdump -ntr NAME_OF_CAPTURED_FILE.pcap 'tcp[13] = 0x02 and dst port 80' | awk '{print $4}' | tr . ' ' | awk '{print $1"."$2"."$3"."$4}' | sort | uniq -c | awk ' {print $2 "\t" $1 }'
    efuoax · 2012-08-22 21:26:10 7
  • Display IP : Count of failed login attempts

    The lastb command presents you with the history of failed login attempts (stored in /var/log/btmp). The reference file is read/write by root only by default. This can be quite an exhaustive list with lots of bots hammering away at your machine. Sometimes it is more important to see the scale of things, or in this case the volume of failed logins tied to each source IP. The awk statement determines if the 3rd element is an IP address, and if so increments the running count of failed login attempts associated with it. When done it prints the IP and count. The sort statement sorts numerically (-n) by column 3 (-k 3), so you can see the most aggressive sources of login attempts. Note that the ':' character is the 2nd column, and that the -n and -k can be combined to -nk. Please be aware that the btmp file will contain every instance of a failed login unless explicitly rolled over. It should be safe to delete/archive this file after you've processed it. Show Sample Output


    1
    sudo lastb | awk '{if ($3 ~ /([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}/)a[$3] = a[$3]+1} END {for (i in a){print i " : " a[i]}}' | sort -nk 3
    sgowie · 2012-09-11 14:51:10 4
  • Find the 10 users that take up the most disk space

    In OSX you would have to make sure that you "sudo -s" your way to happiness since it will give a few "Permission denied" errors before finally spitting out the results. In OSX the directory structure has to start with the "Users" Directory then it will recursively perform the operation. Your Lord and master, Mematron Show Sample Output


    1
    sudo -s du -sm /Users/* | sort -nr | head -n 10
    mematron · 2012-09-13 10:15:23 4
  • Get top N files in X directory

    You can simply run "largest", and list the top 10 files/directories in ./, or you can pass two parameters, the first being the directory, the 2nd being the limit of files to display. Best off putting this in your bashrc or bash_profile file Show Sample Output


    1
    largest() { dir=${1:-"./"}; count=${2:-"10"}; echo "Getting top $count largest files in $dir"; du -sx "$dir/"* | sort -nk 1 | tail -n $count | cut -f2 | xargs -I file du -shx file; }
    jhyland87 · 2013-01-21 09:45:21 7
  • Shows size of dirs and files, hidden or not, sorted.

    Enhanced version: fixes sorting by human readable numbers, and filters out non MB or GB entries that have a G or an M in their name.


    1
    du --max-depth=1 -h * |sort -h -k 1 |egrep '(M|G)\s'
    TerDale · 2013-02-14 08:56:56 6
  • (DEBIAN-BASED DISTROS) Find total installed size of packages given a search term

    Replace \-dev with whatever you wanna search for


    1
    dpkg-query -Wf '${Installed-Size}\t${Package}\n' | grep "\-dev" | sort -n | awk '{ sum+=$1} END {print sum/1024 "MB"}'
    threv · 2013-02-15 20:29:18 4
  • Display 16 largest installed RPMs in size order, largest first

    Interesting to see which packages are larger than the kernel package. Useful to understand which RPMs might be candidates to remove if drive space is restricted. Show Sample Output


    1
    rpm -qa --queryformat '%{size} %{name}-%{version}-%{release}\n' | sort -k 1,1 -rn | nl | head -16
    mpb · 2013-03-19 21:10:54 6
  • Display unique values of a column

    the column number is '6'


    1
    cut -d',' -f6 file.csv | sort | uniq
    richie · 2013-04-10 14:05:32 6
  • Prints total line count contribution per user for an SVN repository

    make usable on OSX with filenames containing spaces. note: will still break if filenames contain newlines... possible, but who does that?!


    1
    svn ls -R | egrep -v -e "\/$" | tr '\n' '\0' | xargs -0 svn blame | awk '{print $2}' | sort | uniq -c | sort -nr
    rymo · 2013-04-10 19:37:53 5
  • Mapreduce style processing

    parallel can be installed on your central node and can be used to run a command multiple times. In this example, multiple ssh connections are used to run commands. (-j is the number of jobs to run at the same time). The result can then be piped to commands to perform the "reduce" stage. (sort then uniq in this example). This example assumes "keyless ssh login" has been set up between the central node and all machines in the cluster. bashreduce may also do what you want. Show Sample Output


    1
    parallel -j 50 ssh {} "ls" ::: host1 host2 hostn | sort | uniq -c
    macoda · 2013-04-12 11:56:41 7
  • most used unix commands


    1
    awk '{print $1}' ~/.bash_history | sort | uniq -c | sort -rn | head -n 10
    nesses · 2013-05-03 16:24:30 6
  • directory size with subdirectories, sorted list


    1
    du -m --max-depth=1 [DIR] | sort -nr
    Paulus · 2013-07-26 07:04:41 12
  • List your largest installed packages (on Debian/Ubuntu)

    The other commands were good, but they included packages that were installed and then removed. This command only shows packages that are currently installed, sorts smallest to largest, and formats the sizes to be human readable. Show Sample Output


    1
    dpkg-query --show --showformat='${Package;-50}\t${Installed-Size}\n' `aptitude --display-format '%p' search '?installed!?automatic'` | sort -k 2 -n | grep -v deinstall | awk '{printf "%.3f MB \t %s\n", $2/(1024), $1}'
    EvilDennisR · 2013-07-26 23:18:20 13
  • Diff two directories by finding and comparing the md5 checksums of their contents.

    Compute the md5 checksums for the contents of two mirrored directories, then sort and diff the results. If everything matches, nothing is returned. Otherwise, any checksums which do not match, or which exist in one tree but not the other, are returned. As you might imagine, the output is useful only if no errors are found, because only the checksums, not filenames, are returned. I hope to address this, or that someone else will!


    1
    diff <(sort <(md5deep -r /directory/1/) |cut -f1 -d' ') <(sort <(md5deep -r /directory/2/) |cut -f1 -d' ')
    unixmonkey64021 · 2013-08-18 22:13:07 6
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Restore mysql database uncompressing on the fly.
This way you keep the file compressed saving disk space. Other way less optimal using named pipes: mysql -uroot -p'passwd' database <

list block devices
Shows all block devices in a tree with descruptions of what they are.

Batch Convert SVG to PNG (in parallel)
Convert some SVG files into PNG using ImageMagick's convert command. Run the conversions in parallel to save time. This is safer than robinro's forkbomb approach :-) xargs runs four processes at a time -P4

Use md5sum to check your music and movie files. Also use diff.
This is a beginning script. You can create a file with > filename. You can also use diff to compare output run at different times to verify no change in your files. I apologize in advance if this is too simple. For some it should be a start.

Format partition with ext4 but without a journal
For slow flash memory (cheap thumb drive), ext4 is the fastest stable file system for all use cases with no relevant exception: http://www.linuxplanet.com/linuxplanet/tutorials/7208/1 Since we can usually dispense with the benefits of a journal for this type of storage, this is a way to achieve the least awful I/O-speed. Disabling the journal for an existing ext4 partition can be achieved using $ tune2fs -O ^has_journal /dev/sdXN Note that it is often recommended to format removable flash media with ext2, due to the lack of a journal. ext4 has many advantages over ext2 even without the journal, with much better speed as one of the consequences. So the only usecase for ext2 would be compatibility with very old software.

calulate established tcp connection of local machine
If you want prepend/append text just wrap in echo: $echo Connected: `netstat -an|grep -ci "tcp.*established"`

Doing some floating point calculations with rounding (e.g. at the 3rd decimal)

Right-align text in console using pipe like ( command | right )

Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested

Show webcam output
Show the webcam output with mplayer.

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