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Commands by mpb

Commands by mpb from sorted by
Terminal - Commands by mpb - 32 results
rpm -qa --queryformat '%{installtime} \"%{vendor}\" %{name}-%{version}-%{release} %{installtime:date}\n' | grep "Thu 05 Mar"
2009-03-17 13:38:20
User: mpb
Functions: grep rpm
4
Up
Down
Display a list of RPMs installed on a particular date

Find out which RPMs were installed on a particular date.

These would (naturally) include update RPMs.

This example shows searching for "Thu 05 Mar" (with grep).

Alternatively, pipe it to less so you can search inside less (with less's neat text highlighting of the search term):

rpm -qa --queryformat '%{installtime} \"%{vendor}\" %{name}-%{version}-%{release} %{installtime:date}\n' | less # (this example) search term: Thu 05 Mar

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
play $audio_file
2009-03-17 11:30:02
User: mpb
-3
Up
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Play audio file

"play" is part of "SoX"

SoX - Sound eXchange, the Swiss Army knife of audio manipulation.

For details, see: man sox

Show sample output | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
:!cp % %-
2009-03-17 00:34:24
User: mpb
5
Up
Down
Create a backup of file being edited while using vi

At the start of a vi session and *before* saving any changes use ":!cp % %-" to make a backup of the current file being edited.

example: vi /data/some/long/path/file

:!cp% %-

creates /data/some/long/path/file-

Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
# indicates a comment in shell
2009-03-16 23:15:33
User: mpb
-4
Up
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#

Using the "#" in shell is surprisingly useful.

Some of the uses I found:

a) As a visible copy buffer in shell history (caveat: do not use for passwords :-)

b) To build complex commands until ready then hit the HOME, DEL, ENTER keys to run it

c) Placing reference data into shell history (search for tags with CTRL-R TAGNAME)

d) Putting aside a "work in progress" command to focus on another task (HOME # ENTER)

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
rpm -qa --qf '%{SIZE} %{NAME}\n' | sort -nr | nl | head -6 # six largest RPMs
2009-03-15 22:18:17
User: mpb
Functions: head nl rpm sort
2
Up
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Display 6 largest installed RPMs sorted by size (descending)

Low on disk space? Check the largest installed RPMs for delete canditates.

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ls -1 | grep " " | awk '{printf("mv \"%s\" ",$0); gsub(/ /,"_",$0); printf("%s\n",$0)}' | sh # rename filenames: spaces to "_"
2009-03-15 18:42:43
User: mpb
Functions: awk grep ls rename sh
2
Up
Down
Convert embedded spaces in filenames to "_" (underscore)

This command converts filenames with embedded spaces in the current directory replacing spaces with the underscore ("_") character.

Show sample output | Comments (13) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
gcal -K -q GB_EN 2009 # display holidays in UK/England for 2009 (with week numbers)
2009-03-15 10:19:52
User: mpb
5
Up
Down
Display calendar with specific national holidays and week numbers

NB when you run this gcal command in your shell, holidays are highlighted

but this highlighting does not show in the sample output (above).

To find full details on gcal options: gcal --long-help | less

Example for United States, Pennsylvania:

gcal -K -q US_PA 2009 # display holidays in USA/Pennsylvania for 2009 (with week numbers)

Example for Hong Kong:

gcal -K -q HK 2009 # display holidays in Hong Kong for 2009 (with week numbers)

Show sample output | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate