Commands tagged type (8)

  • 5 Which Aliases

    5 helpful aliases for using the which utility, specifically for the GNU which (2.16 tested) that is included in coreutils. Which is run first for a command. Same as type builtin minus verbosity alias which='{ command alias; command declare -f; } | command which --read-functions --read-alias' Which (a)lias alias whicha='command alias | command which --read-alias' Which (f)unction alias whichf='command declare -f | command which --read-functions' Which e(x)ecutable file in PATH alias whichx='command which' Which (all) alias, function, builtin, and files in PATH alias whichall='{ command alias; command declare -f; } | command which --read-functions --read-alias -a' # From my .bash_profile http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output


    2
    alias whichall='{ command alias; command declare -f; } | command which --read-functions --read-alias -a'
    AskApache · 2010-11-18 03:32:04 5
  • Determine command type (alias, keyword, function, builtin, or file)

    Prints a string indicating whether a command is an alias, keyword, function, builtin, or file. I have used this in my BASH scripts to allow an external parameter to define which function to run, and ensure that it is a valid function that can indeed be run. Show Sample Output


    1
    type -t $1
    bbbco · 2012-01-10 21:57:29 0
  • How to delete all the archive files with extension *.tar.gz and greater than 10MB?

    Please be careful while executing the following command as you don?t want to delete the files by mistake. The best practice is to execute the same command with ls ?l to make sure you know which files will get deleted when you execute the command with rm.


    0
    find / -type f -name *.tar.gz -size +10M -exec ls -l {} \;
    0disse0 · 2010-06-29 12:39:02 2
  • get disk usage sum for files of type

    print sum of disk usage for filetype within current dir and subdirs Show Sample Output


    0
    find . -name '*.xml' -type f -print | xargs du -ch
    nathwill · 2011-03-22 00:47:42 0
  • Adds "-c" canonical option to bash "type" builtin command to follow symbolic links

    The "type" builtin command is handy to find out what executable will be used if you issue a command. But on some distros, particularly when using /etc/alternatives, certain executables get buried under layers and layers of symbolic links and it becomes hard to find which one. If you put the above command in your .bashrc, it adds a "-c" option to the type command that will weed through the symbolic links and prints the actual file that will be executed. Show Sample Output


    0
    type () { if [ "$1" = "-c" ]; then shift; for f in "$@"; do ff=$(builtin type -p "$f"); readlink -f "$ff"; done; else builtin type $typeopts "$@"; fi; }
    splante · 2011-04-07 18:57:51 0
  • Find core files

    Will find and list all core files from the current directory on. You can pass | xargs rm -i to be prompted for the removal if you'd like to double check before removal.


    0
    find . -type f -regex ".*/core.[0-9][0-9][0-9][0-9]$"
    H3liUS · 2014-01-17 16:44:47 0
  • guess the filetype for a file


    0
    file file.txt
    lolssl · 2015-10-01 19:40:49 0
  • What Type of Computer Do You Have?

    Prints the type of computer you have. I think this should be used more in distros and other applications because it is so easy to get. This can also be asked by tutorials as an easy way to get your base hardware. Some alternatives: sudo dmidecode -s system-product-name and sudo smbios-sys-info-lite | sed -n 's/^Product Name: *\(.*\)/\1/p' Show Sample Output


    -2
    cat /sys/devices/virtual/dmi/id/board_name
    matthewbauer · 2010-04-22 03:21:40 4

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

Binary clock
Fun idea! This one adds seconds and keeps running on the same line. Perl's probably cheating though. :)

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Empty a file
Immediately make a file empty. This even works if the file is still being written to. Great for cleaning up huge log files!

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

Help shell find freshly installed applications (re: PATH)
Immediately after installing things into your PATH (e.g. under /usr/bin), currently open shells cannot find them ("zsh: command not found"). Use rehash to get the shell to rescan available executables.

Recursively remove .svn directories from a local repository

Test a serial connection
If the connection works you should see a "hello" on host A. If not: check your cabeling etc :-)

Display a block of text: multi-line grep with perl
-n reads input, line by line, in a loop sending to $_ Equivalent to while () { mycode } -e execute the following quoted string (i.e. do the following on the same line as the perl command) the elipses .. operator behaves like a range, remembering the state from line to line.

Print a list of installed Perl modules
This version works on an AIX system on which I have very limited permissions. The other version fails with "Can't open file /usr/opt/perl588/lib/site_perl/5.8.8/aix/auto/DBI/.packlist".

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