Commands by alcik (4)

  • You can use wildcard with rpm search but you have to do 2 things: 1. use "-a" switch (means "all") with query ("-q") switch - argument is a pattern to use while searching for package names of all installed packages 2. protect wildcards, so that shell could not eat them - escape it with backslash ("\") or enclose all pattern between apostrophes ("'"): rpm -qa 'co*de' As you can see above it is possible to insert wildcards into middle of the pattern. If you want, you can add "-i" or another rpm query options, "-i" will print package information for all installed packages matching pattern. Show Sample Output

    rpm -qa \*code\*
    alcik · 2009-03-11 21:16:23 1
  • This example summarize size of all pdf files in /tmp directory and its subdirectories (in bytes). Replace "/tmp" with directory path of your choice and "\*pdf" or even "-iname \*pdf" with your own pattern to match specific type of files. You can replace also parameter for du to count kilo or megabytes, but because of du rounding the sum will not be correct (especially with lot of small files and megabytes counting). In some cases you could probably use sth like this: du -cb `find /tmp -type f -iname \*pdf`|tail -n 1 But be aware that this second command CANNOT count files with spaces in their names and it will cheat you, if there are some files matching the pattern that you don't have rights to read. The first oneliner is resistant to such problems (it will not count sizes of files which you cant read but will give you correct sum of rest of them). Show Sample Output

    SUM=0; for FILESIZE in `find /tmp -type f -iname \*pdf -exec du -b {} \; 2>/dev/null | cut -f1` ; do (( SUM += $FILESIZE )) ; done ; echo "sum=$SUM"
    alcik · 2009-03-05 17:16:52 3
  • It displays, last 15 yum operations (in last operation as first row order) with its dates. Change 15 to any number of operations you need to display or remove "| tac" to see it in reverse order (last operation as last row)

    tail -n 15 /var/log/yum.log | tac
    alcik · 2009-03-02 08:56:04 1
  • Replace 'more' command with any command which is in your PATH. Show Sample Output

    rpm -qif `which more`
    alcik · 2009-02-27 08:59:07 2

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Stamp a text line on top of the pdf pages.
To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.

Install pip with Proxy
Installs pip packages defining a proxy

Gets the english pronunciation of a phrase
Usage: say hello world how are you today

A command to post a message and an auto-shortened link to Twitter. The link shortening service is provide by TinyURL.
A command to post a message and an auto-shortened link to Twitter. The link shortening service is provided by TinyURL.

Job Control
background and disown, but with a proper one-line syntax

Count number of files in a directory

matrix in your term
-a : Asynchronous scroll -b : Bold characters on -x : X window mode, use if your xterm is using mtx.pcf

sudo for launching gui apps in background
Need package: gksu Note: Launching gui app in background that needs sudo, won't work great with our old friendly style of launching: $ sudo gedit /etc/passwd & because this would put sudo in background ! Using gksudo as demonstrated, would popup a gui sudo window. May be this is a common knowledge, but not knowing this frustrated me during my newbie year.

Bypass 1000 Entry limit of Active Directory with ldapsearch
That command bypass the entry limit specifing page results size, when the search arrive to the limit ldapsearch magically reiterate it from the last entry.

Remove all the files except abc in the directory
This is for zsh with extended globbing.

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