Sponsored Content
Full Discussion: Bash shell expansion help
Top Forums Shell Programming and Scripting Bash shell expansion help Post 302955593 by Don Cragun on Saturday 19th of September 2015 05:12:27 AM
Old 09-19-2015
Not that we don't believe you, but what you're saying doesn't make sense...

Please show us the output from the commands:
Code:
pwd
ls -l /shell_expansion/*.txt $HOME/shell_expansion/*.txt ./shell_expansion/*.txt ./*.txt

(both on standard output and on standard error output).

And, just for the fun of it, please explain why you want to print the names of all of the names of files ending in the string .txt in a directory four times.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

bash - delay expansion of variable

Hello - I have a bash script which does some logging, and I'd like to include the line number of the echo statement that pipes into $LOGGER: MYPID=$$ MYNAME=`basename $0` LOGGER="/usr/bin/logger -t $MYNAME($LINENO) -p daemon.error" ... echo 'this is an entry into the log file' | $LOGGER ... (3 Replies)
Discussion started by: scandora
3 Replies

2. Shell Programming and Scripting

Brace expansion problem in Bash

I have a script that takes an option for server pools to run the script against. The option is given as a comma separated list (ie, -p 201,204,301). I'm using eval and brace expansion to get those pool numbers into an array. It works fine unless only 1 pool number is given. Here's the code: ... (5 Replies)
Discussion started by: mglenney
5 Replies

3. Shell Programming and Scripting

Bash variable delayed expansion?

i write a batch file , here is the content. dirname='date +%Y-%m-%d' mkdir dirname but it doen's work, it just create a folder named date and +%Y-%m-%d. i have tried run the command seperately in the bash prompt. after the first sentence executed , i use $dirname to watch the value of... (4 Replies)
Discussion started by: premotheus
4 Replies

4. Shell Programming and Scripting

Does SH support indirect expansion like BASH?

Hello, is there a kind soul who can answer me, does the SH support double substitution known as indirect expansion similar to BASH? The syntax for bash is ${!var}. For instance in bash I can write something like this: VAR="value" REF_VAR="VAR" echo ${!REF_VAR} and get the "value"... (1 Reply)
Discussion started by: dimentiy
1 Replies

5. Shell Programming and Scripting

Bash expansion

Hello. I cannot write a command without using eval. Any help is welcome Note 1 : What does the function SOMETHING has no importance. Note 2 : What does the command find has no importance. It is an expansion variable problem : where to put or or or anythings else What works (FILTRE_1... (8 Replies)
Discussion started by: jcdole
8 Replies

6. Shell Programming and Scripting

Bash variable expansion

Hello. The file /etc/fstab contains UUID=957c3295-9944-1593-82e2-2b90dede4312 / ext4 noatime,discard,acl,user_xattr 1 1 I fill a variable SOME_LINE=$( cat /etc/fstab | grep \/\..*ext4 | grep noatime,discard )echo $SOME_LINE... (3 Replies)
Discussion started by: jcdole
3 Replies

7. Shell Programming and Scripting

Bash Parameter Expansion

I have made the following examples that print various parameter expansions text: iv-hhz-sac/hpac/hhz.d/iv.hpac..hhz.d.2016.250.070018.sac (text%.*): iv-hhz-sac/hpac/hhz.d/iv.hpac..hhz.d.2016.250.070018 (text%%.*): iv-hhz-sac/hpac/hhz (text#*.): d/iv.hpac..hhz.d.2016.250.070018.sac... (2 Replies)
Discussion started by: kristinu
2 Replies

8. Shell Programming and Scripting

Bash Parameter Expansion

#!/bin/bash SNMPW='/usr/bin/snmpwalk' while read h i do loc=$($SNMPW -v3 -u 'Myusername' -l authPriv -a SHA -A 'Password1' -x AES -X 'Password2' $i sysLocation.0 2>/dev/null) loc=${loc:-" is not snmpable."} loc=${loc##*: } loc=${loc//,/} echo "$i,$h,$loc" done < $1 My question is ... ... (1 Reply)
Discussion started by: sumguy
1 Replies

9. Shell Programming and Scripting

Bash : More parameter expansion and IFS

I am trying to become more fluent with the interworking of bash and minimize the number of external calls. Sample Data. This will be the response of the snmp query. SNMPv2-MIB::sysName.0 = STRING: SomeHostName SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.9.1.1745... (5 Replies)
Discussion started by: sumguy
5 Replies

10. Shell Programming and Scripting

Use parameter expansion over a parameter expansion in bash.

Hello All, Could you please do help me here as I would like to perform parameter expansion in shell over a parameter expansion. Let's say I have following variable. path="/var/talend/nat/cdc" Now to get only nat I could do following. path1="${path%/*}" path1="${path1##*/}" Here... (8 Replies)
Discussion started by: RavinderSingh13
8 Replies
X2SYS_MERGE(1gmt)					       Generic Mapping Tools						 X2SYS_MERGE(1gmt)

NAME
x2sys_merge - Merge an updated COEs tables SYNOPSIS
x2sys_merge -Amain_COElist.d -Mnew_COElist.d DESCRIPTION
x2sys_merge will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second file should only contain updated COEs relatively to the first one. That is, it MUST NOT contain any new two tracks intersections (This point is NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had to recompute only the COEs between the edited files and the rest of the database. -A Specify the file main_COElist.d with the main crossover error data base. -M Specify the file new_COElist.d with the newly computed crossover error data base. OPTIONS
No space between the option flag and the associated arguments. EXAMPLES To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt SEE ALSO
x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1) GMT 4.5.7 15 Jul 2011 X2SYS_MERGE(1gmt)
All times are GMT -4. The time now is 02:39 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy