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Questions tagged [expansion]

32 questions
115
votes
4 answers

how to expand aliases inline in bash?

Is there a way to expand aliases inline in bash? $bash>alias ll='ls -l ' $bash>ll $bash>ls -l
asdfg
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36
votes
2 answers

What is the brown slot near the CPU socket on a Pentium 1 motherboard, and what is it used for?

What is this slot called and what is it for on a Pentium 1 motherboard? Here I give you the Asus P/I-P55T2P4 rev 2.1 board:
Thraka
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24
votes
4 answers

Is it possible to print out the shell expansion?

I know there is a specific set of rules that shell expand the commands user typed. (let's talk about bash shell.) Is it possible to print out a command in the form after shell expansion? It seems to be a good utility to learn and make sure how shell…
Weishi Z
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14
votes
3 answers

What is the meaning of asterisk, backslash, colon and two in (*\:2)?

What is the meaning of following ls command? ls -l *\:2,*T ls = list -l = long (list) *T probably means T at the end But what about that *\:2 and the comma?
Jürgen Gmach
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12
votes
4 answers

Brace expansion : run several commands instead of expanding on one line?

When you use brace expansion in bash, something like echo {a,b,c} becomes echo a b c Is there a way to expand it to 3 separate commands, one for each expansion, instead? So that: echo {a,b,c} would become echo a echo b echo c
houbysoft
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10
votes
2 answers

Can I keep . and .. out of .* expansion?

I often find it annoying (or worse) when I type command .* in bash and the command applies to the parent directory and current directory. Is there some shell option or other configuration I can tweak to make bash exclude . and .. from the expansion…
David Z
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6
votes
2 answers

Is a PCIE X1 card for USB 3.0 worth it?

I have a portable HDD on USB 3.0, and soon I'll have a 32gb flash drive on USB 3.0 as well. My motherboard is pretty old - and the next time I'll upgrade it is when I get a new CPU/mobo/ram. Slots on my mobo: PCIE X16 - For my GTX 260 2xPCI PCIE…
Amir
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4
votes
1 answer

Is it safe to stop a RAID 5 expansion?

I'm having some issues expanding a RAID 5 array on a Synology DS413. The drive has gone from 3 x 3TB WD Green drives to 4 x 3TB. I started an expansion operation and it's been stuck at about 60% and extremely slow speeds for a week (about 350Kb/s…
Tom Maitland
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3
votes
2 answers

Bash parameter Expansion: Best practices for speed?

I was just wondering if anybody knows any best practices or if there is any documentation about this topic: The scenario is searching / grepping in the log files. To make my point I will use ls. So let's say that I run ls to list a series of files…
runlevel0
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3
votes
2 answers

Expand Synology SHR volume with varying disk sizes

I'm looking for a clarification on SHR and how it handles expanding a volume when the volume contains varying disk sizes. I've read the Synology Documentation and it still isn't clear, because their use-case assumes that the original volume was…
rabhw
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2
votes
0 answers

How do I properly architect my home network expansion?

I have FIOS verizon on 1 router w/wifi connected to 6 wireless devices, 1 network printer & 3 wired computers. I want to add to my network, NAS storage (cloud access), 4 FIOS TV'S, Home Theatre, thermostats, security systems, security cameras, etc…
Frank L Day
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2
votes
2 answers

duplicate a single file to a list of files

I'd like to know if it is possible to duplicate a single file to multiple files with a different list of arguments. I have a generic image and I need to make multiple copies of it adding a different country extension to each copy. I tried…
Yannick Schall
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2
votes
1 answer

Old school boom box input equivalent using SoX

I used to have a cassette tape/radio unit (boom box format) device. I used to use this to record mix tapes from my dual turntable and mixer setup. The resulting tapes were - for me - ideal for playing in the car because The tape itself ran a tad…
AlanT
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2
votes
1 answer

Find substring from a array of patterns

I have a file with extensions: f1=f1.e1.e2.e3.sh.pl.cpp I have an array containing a list of extensions: exts=(sh pl py) I want to remove the extensions in exts from the filename's. Is there a trick to do it, I'm thinking of something of this…
kaligne
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1
vote
1 answer

Is it possible to use brace expansion and globbing together?

Say I wanted to copy the .ssh/authorized_keys file in each user's /home directory to /tmp (for whatever reason). I figured I could use globbing and brace expansion to do this quickly, but I ran into trouble. I tried using something like key_for_{*}…
Ziggy
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