Questions about bash only, as opposed to other Bourne/POSIX shells. For all Bourne/POSIX-style shells, use the /shell tag instead.

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5
votes
1answer
2k views

The best way to expand glob pattern?

I need to expand a glob pattern (like ../smth*/*, or /etc/cron*/) into a list of files, programmatically. What would be the best way to do it?
6
votes
3answers
16k views

How to write a bash script, that logs onto an other machine to do stuff?

Is it possible to write a bash script, that would be started from machine A, logs in on a different machine B by ssh (both machines A and B would be Linux-Machines), copys some files on to machine B ...
2
votes
1answer
227 views

Chown and the risk of corrupting the backup disk

I am about to modify the file ownership recursively in a filesystem that uses ACLs. Because it is my backup disk, I thought I'd solicit comments on the script before I run it. #!/bin/bash # Replace ...
6
votes
1answer
2k views

Bash read command and stdin redirection

As I understand the bash documentation both | and < redirect stdin. So, cmd | foo and foo < <(cmd) should be more or less equivalent. However, for the bash-internal read command this doesn't ...
0
votes
1answer
385 views

Cryptic Bash Crash

I've tried to run the following bash script: #!/bin/bash x=1 while [ $x -le 10 ] do echo "Welcome $x times" x = $(( $x + ...
0
votes
1answer
779 views

Connecting various process attributes reported by top, ps, /proc/pid/statm, /proc/pid/status, /proc/pid/smaps [closed]

Here are some of the common attributes I figured out: top(VIRT) , smem(VSS), /proc/pid/statm (1st entry in pages), /proc/pid/status (VmSize), ps(VSZ) top(RES) , smem(RSS), /proc/pid/statm (2nd entry ...
2
votes
1answer
475 views

xmodmap equivalent in bash

I'm constantly on bash via ssh, on a computer that doesn't have X. In my computer I've switched the keyboards' Super and Alt keys with xmodmap. Is it possible to do it on the computer in which I log ...
7
votes
1answer
2k views

How can I alias to `!!` (last command)?

!! in bash runs last command. I find it too difficult to type given how much I use it. alias to the rescue, I presumed. Or not. I tried: $ alias dl='!!' # Aliasing $ echo Testing123 ...
0
votes
2answers
754 views

Bash script error trying to find directory of script itself: unexpected end of file

Borrowing graciously from this StackOverflow answer, I want to find the directory a script is running in so I can load relative paths for it on login: The script is pretty small right now: ...
3
votes
0answers
79 views

any way to un-disown / re-attach an interactive process to the tty? [duplicate]

Possible Duplicate: How can I disown a running process and associate it to a new screen shell? In bash is there an opposite of disown, that is, to re-attach a process I've accidentally ...
2
votes
3answers
570 views

Rename a lot of files with all types of characters, with POSIX portability

Sometimes I need to rename all the files (the renaming convention follows later) in a directory where the filename is always in the form of 'filenamename.extension' (extension always exists and ...
2
votes
1answer
1k views

Is there a shell utility for printing the contents of a plist? Preferably for a jailbroken iOS device?

I need a tool that prints the actual text in a plist file (plutil changes the format, cat prints gibberish, and there is no defaults command for iOS). It needs to be in a script, so text editors don't ...
7
votes
4answers
6k views

Diff several files, true if all not equal

I have a number of files, I want to check that all those files have the same content. What command line could I use to check that? Usage could be something like: $ diffseveral file1 file2 file3 ...
7
votes
4answers
3k views

Find files with same name but different content?

I want to generate a list of files that have: Same name Different content in a directory (including all children directories and content). How to do? Bash, perl, anything is fine. So, two ...
1
vote
2answers
4k views

How to write a file at various offsets to a filesystem partition with dd command

Requirement I want to write a file at various offsets into the partition Partition /dev/part2 is mounted at /mypart I tried the command below: dd if=/dev/urandom of=/mypart/aaa bs=1024 seek=0 ...
9
votes
2answers
2k views

Alternative to watch which support colors

I have a command (phpunit) which has a colored output. According to the watch, command I should be able to use the --color flag to allow color rendering to pass through. However, this isn't working. ...
1
vote
2answers
772 views

start apache script

I've got Apache installed on my local Linux (sabayon) OS, just for programming testing. What I want is a script so that the server starts right away when I want it. This is the code: #!/bin/bash # ...
3
votes
2answers
2k views

Change directory with -d in shell script

I am trying to give the option to the users to run the script in a different directory. However when the script changes the directory, the mkdir does not work. I change the directory like this: case ...
2
votes
2answers
417 views

Is it possible to define where the .bash_profile is located on the bash command line?

I'm running bash programmatically from objective c to create a terminal-like application. Once launched I would like to execute some commands prior to turning control over to the user. Normally these ...
0
votes
0answers
44 views

-d shell script doesn't work [duplicate]

Possible Duplicate: Change directory with -d in shell script I am trying to give the option to the users to run the script in a different directory. However when the script changes the ...
2
votes
3answers
195 views

is it possible to lock a user into a give directory tree in bash?

I want to lock a user into a given directory tree. That is he/she can cd deeper into the tree but no higher out of the tree. Everything else in the environment should be the exact same. Edit: How can ...
3
votes
2answers
2k views

What does this output from xev mean?

I'm interested in remapping some keys on my keyboard. In particular, I want to hold down the Function key, press the F1 key, and have this trigger a script. I know that xev is useful for figuring out ...
2
votes
1answer
132 views

Preventing LyX from getting a SIGHUP and closing when the terminal window is closed

I have written a Ruby script to manage my LyX documents. The script has a short CLI interaction with the user(=me), and then it decides the name of the file to open, and opens it via a lyx shell ...
20
votes
3answers
11k views

Can't use exclamation mark (!) in bash?

I'm trying to use the curl command to access a http url with a exclamation mark (!) in its path. e.g: curl -v "http://example.org/!287s87asdjh2/somepath/someresource" the console replies with bash: ...
21
votes
3answers
8k views

How to enable autocompletion for remote paths when using scp?

I remote copied a file to my laptop using: scp someFile USER@192.168.178.32:/home/USER/put/it/some/where/oh/damn/you/here I want to be able to autocomplete the remote path by hitting tab.
22
votes
3answers
2k views

Bash: repeat last N commands [duplicate]

In bash you can repeat the last command by entering !!, or the third last command !-3 for example. Is there a quick way to repeat the last 3 commands, without having to type out !-1; !-2; !-3 ...
6
votes
5answers
11k views

make grep output without trailing newline

Please consider this snippet: X=$(grep -m1 'some-pattern' some-file | sed -n 's/.* //p') I want to put last word in a variable if some pattern condition is matched for lines in arbitrary text file ...
2
votes
1answer
505 views

Configure autocomplete for the first argument, leave the others alone

I have a utility that takes a load of different arguments. For now, I want to autocomplete the first argument, but leave all the others to fall through to normal autocompletion. How do I do that? ...
4
votes
2answers
4k views

Can I redirect logfiles to syslog?

I have a Node.js server that is being monitored by forever. Forever generates three logfiles: the server STDOUT, STDERR and the log of forever itself. $ forever -l forever.log -o out.log -e err.log ...
14
votes
3answers
2k views

Bash scripting and large files (bug): input with the read builtin from a redirection gives unexpected result

I have a strange issue with large files and bash. This is the context: I have a large file: 75G and 400,000,000+ lines (it is a log file, my bad, I let it grow). The first 10 chars of each line is ...
3
votes
3answers
2k views

Check if filename exist from inline command

I have a file named input.txt with this contents: ... FILE "Edie - Realities.txt" TXT ... And I want to read it, then strip filename path from line that starts with FILE, and check if it ...
2
votes
1answer
589 views

Memory profiling the linux kernel on an embedded device

I have an linux kernel 2.6.30 on an ARM based embedded device and I have to do some kernel memory usage profiling on the device. I am thinking of monitoring the ps output on various kernel threads ...
5
votes
6answers
4k views

Linux script or program to shorten filenames

I haven't had much success in finding a Linux version of namemangler, which I need to rename 1000 of files so they are readable on Windows. Does anyone know of a Linux program that can do this? If ...
6
votes
2answers
419 views

Is it safe to remove a script file from within that script?

Imagine I have a script foo. It should be run once when the user logs in and isn't needed after a successful run. My question: Is it safe to remove the script file from within the script? E.g.: ...
10
votes
3answers
7k views

How to check if pipe is empty

I have piped line in bash script and want to check if pipe has data, before feeding program Searching I found about test -t 0 but it doesn't work here. Always returns false. So how to be sure that ...
6
votes
3answers
8k views

How to split the output and store it in an array?

This is the output: 3,aac-lc, 93.8, aaclc, 77.3, h.264, 1024.6, h.264, 1029.1, 31, 31, 0,0,0.000000,31,31,0,0,0.000000,7,0,0,0.000000,30,1280 720,10,0,0,0.000000,30,1280 720 I tried with 2 ...
9
votes
3answers
3k views

Have Bash script wait for status message before continuing

I'm firing up Selenium server with a bash script and as you can see from the timestamps on the log below, it takes about 32 seconds for the thing to fully come online: Feb 28, 2012 10:19:02 PM ...
3
votes
1answer
3k views

Real time system info script using ncurses and dialog

I'm trying to create a simple bash script that I can run over ssh that will display some basic system information using ncurses and the dialog command. I've tried two approaches so far: 1) Run dialog ...
4
votes
1answer
1k views

Use sed to fix broken newlines

I have a folder full of files, each with many hundreds of lines. Many of these files have occasional broken newlines: when I open them in vim, many have ^M^L interspersed where newlines should be. ...
1
vote
2answers
374 views

need portable crontab host-checking/failover logic across Linux & Cygwin

A host-ping test that always works correctly from the interactive bash command line in Cygwin, is behaving incorrectly in its own crontab--always selecting the second host--and I can't figure out why: ...
4
votes
3answers
352 views

Converting a history to a script?

Often times I've typed in a bunch of commands when I realize that I am going to keep typing them in and that I would really like a script. Now I understand that no matter how I save my history, I am ...
5
votes
1answer
438 views

history list in bash always truncated to 5000 lines at new login

Similar to the 5000 line limitation problem when first thing in .bashrc I have export HISTSIZE=10001 and export HISTFILESIZE=$HISTSIZE My users do not have ~/.inputrc files and the system-wide ...
1
vote
4answers
3k views

Count number of lines in files then compare which has more (BASH)

I need to count the number of lines in x files and compare which has more. The one I've done only takes two files and compares them. Any idea how to make it x amount of files? echo Enter the ...
3
votes
3answers
1k views

Extracting text from a text file in bash

I have a large text file that is all one line. In the text are several sections that looks like foo=12345 and I need to extract them all as separate lines, ignoring the rest of the file. For ...
4
votes
2answers
2k views

Excluding a file in bash loop

In the following script, How do I exclude a directory in the loop? I want to do this because all files are symlinks pointing to this directory that exists in the same level, so I don't want to add it. ...
0
votes
1answer
126 views

terminal logging doesn't complete when I close the terminal

This is the last line in my .bashrc (lines breaks inserted for readability): STARTTIME=`date +%F-%Hh-%Mm-%Ss-%N`; \ script -q -t 2> /home/USER/logs/$STARTTIME-timing.txt \ -c 'bash --rcfile ...
1
vote
4answers
648 views

Exporting environment variable

I am having some problem with bash. I want to export an environment variable whose value contains a variable but I don't want that variable (which is within the value) to be evaluated during the ...
3
votes
2answers
22k views

Auto running bash script on login

I wanted to make a script which ran automatically on login so I put it into the file ~/bash.profile, but it didnt run. When I put it in bashrc, it ran on opening a terminal. What I was doing in the ...
3
votes
2answers
2k views

Insert a multiline string into another string

I need to insert lines into an xml file : Insert <one> </one> into <tags> </tags> To obtain <tags> <one> </one> </tags> I tried this: ...
1
vote
2answers
326 views

Variable name from command output

I have some string, and want to split on colon ":" assigning on variable with name from left part and value from right part. For example: echo "Title: Some title" | sed 's/:.*//' gives me wanted ...