1
vote
1answer
18 views

how to recall last argument in bash with vi setting

I use set -o vi setting in bash. The shorcut Alt+. (recalling last argument of previous command) here doesn't work as in emacs mode, so what is the equivalent for vi?
3
votes
3answers
185 views

Method for storing/remembering one liner commands

Often when configuring and adjusting unix-based systems I use a lot of one-line commands that are difficult to remember. For example, to determine what version of ntp (the time server) is running, you ...
0
votes
0answers
21 views

What does !$ mean exactly? [duplicate]

echo !$ outputs different strings depending on my previous command line call. For example: mrdumbdumb-redhat:~ mrdumbdumb$ ls mrdumbdumb-redhat:~ mrdumbdumb$ echo !$ echo ls ls ...
3
votes
2answers
97 views

get result text from CLI command

I'm writing a bash script and I need to capture the text resulting from the output of the rsync command, for instance, the following command: rsync -av "$FOLDER1" "$FOLDER2" prints: ... sent ...
2
votes
2answers
39 views

How to make an infinitely executing command kill itself when certain conditions are met?

I'm running a command on command line which infinitely generates a certain data and I'm looking for a particular bit of data, so I used grep to find it. As soon as I get the data, I want the command ...
1
vote
1answer
37 views

How do I Nohup an interactive shell-script?

My Script is having 2 command-line arguments and then just couple of questions, after these questions the script will run for itself, I'm able to pass the command-line argument by just doing, ...
1
vote
3answers
111 views

How to do command-line completion with files and folders

As a new Linux user, one of the things that's kept me away from the Command Line (CL) is that, for tasks involving files and folders (i.e. everything!), the amount of typing involved makes using the ...
3
votes
1answer
134 views

Set Ubuntu System Proxy Settings without Restart from commandline

I am using Ubuntu 14.04 . I want to change the http proxy settings from the command line. This should be equivalent to changing in the GUI(All Settings->Network->Network Proxy) and clicking the button ...
6
votes
1answer
167 views

Echo difference between Ubuntu and Red Hat

I have mostly been experimenting with Ubuntu but recently was using a Red Hat Enterprise system and was surprised at a difference I found setting and displaying environment variables. In Ubuntu I ...
7
votes
2answers
244 views

Is there a shortcut for repeat the second proximate command in bash?

We all know that !! can repeat the last command you do in bash. But sometimes we need to do some operation like $ python test.py $ vim test.py $ python test.py # here is where I need to repeat the ...
1
vote
1answer
84 views

Command-line parameters in bash script not recognised

I use Debian (Raspbian) Wheezy. If this command line works fine: smsd -c sms/out -i 60 -0 -f sms/smsd.log and this alias also works fine: bsmsd='smsd -c sms/out -i 60 -0 -f sms/smsd.log' then ...
4
votes
3answers
52 views

Is it possible to view the list of file names of a zip file which is inside another zip file?

I know I can use unzip -l file.zip to view the file list of a zip file. But a got a zip file inside another zip file. I tried unzip -l file.zip/sub_file.zip, but failed. Is it possible to view the ...
2
votes
4answers
118 views

How to disable a shell keyword?

Using enable builtin command we can disable a shell builtin command, for example echo, as follow: enable -n echo But how can we disable a shell keyword like time? If we try: enable -n time we ...
3
votes
4answers
258 views

Make many subdirectories at once

Suppose I have a directory /, and it contains many directories /mydir, /hisdir, /herdir, and each of those need to have a similar structure. For each directory in /, there needs to be a directory doc ...
1
vote
3answers
45 views

Command to 're-apply' previous command?

Is there an easy way to re-apply a previous command to a new command line entry? Say I typed in chmod u+r,g+x file.txt but forgot the sudo. Could I simply type sudo <some easy symbol>'? ...
2
votes
1answer
62 views

Memory buffer in a bash script

I have recently finished a script that will ask for a hostname and automatically take the argument of the function and ssh into one of my work servers. Here is a copy of my script: #!/bin/bash echo ...
16
votes
2answers
465 views

How to retrieve lost aliases?

Let me start by saying I know this was dumb. Time and Linux make fools of us all. I made an echo command to my .bash_aliases file and erased all of my aliases, except the test alias. However, I ...
2
votes
1answer
78 views

Why are aliases missing inside of bash command?

When I run in my terminal: alias a list with all my aliases (defined in ~/bashrc and ~/.bash_aliases files) will be displayed on my terminal. That's nice and as expected! But when I run: bash -c ...
24
votes
4answers
2k views

Is it possible to define a command in bash?

For example, can I set gb = cd /media/Dan/evolution So that everytime I execute gb in bash, I can cd to that particular directory? I find something online, alias command. But It seems can't do the ...
1
vote
4answers
130 views

How can I output the difference between 2 files?

My file consists of the the following; roughly: username:username:username:username:username The above line continues to about 600 characters. I use the awk command in order to use it as an ...
2
votes
1answer
67 views

How can I make mailx inform me of new mail?

I'm trying to set up mailx on my server. On one server (Raspbian) I am informed of new mail with a message You have new mail (or something similar). On another machine (Raspbmc), I never have this ...
1
vote
1answer
58 views

Why does the same sed regex (after grep) fail when run in a bash script vs bash command line?

Here's the script. It is successful when I run it from the BASH prompt, but not in the script. Any ideas? When I say "fails," I mean the sed regex doesn't match anything, so there is no replaced ...
1
vote
2answers
122 views

Configure bash and/or vim to execute source ~/.bashrc everytime I finish editing it

I would like to execute source ~/.bashrc every time I finish editing a file with vim (i.e. after :wq vim command). How should I configure vim or bash to work that way?
5
votes
3answers
161 views

Combining brace expansion and output redirection

Often, I use parameter expansion on the command-line, such as cp a.{ext1,ext2} which is expands to cp a.ext1 a.ext2 However, in many cases I do not use cp, but another tool, let's call it cat, ...
3
votes
2answers
36 views

How can I list the info for an array of /dev/disks using bash expansion or substitution?

I want the output of: diskutil list; diskutil info [multiple devices] Without having to do: diskutil info disk0; diskutil info disk0s1; diskutil info disk1 ...etc For example, with many builtin ...
1
vote
5answers
112 views

How to copy a file from a remote network to the local desktop

So I used SSH to remotely login to another computer on a network. I have many files that I would like to copy over to my local desktop. I am trying to follow this How-to : However, I think one ...
9
votes
2answers
423 views

disable CTRL-D window close in terminator (terminal emulator)

I am often logged in through multiple SSH sessions. To logout from my sessions, I press CTRL+d, until I am back on my local machine. However, sometimes I press once too many, and my terminal exits. ...
7
votes
6answers
1k views

How to read first and last line from cat output?

I have text file. Task - get first and last line from file after $ cat file | grep -E "1|2|3|4" | commandtoprint $ cat file 1 2 3 4 5 Need this without cat output (only 1 and 5). ~$ cat file | ...
8
votes
3answers
508 views

Local, timestamped logging of all ssh commands?

How can I keep a local, timestamped record of all remote commands I use in ssh (command-line openssh client started through bash)? Requirements: Essential: 100% client-side without relying on ...
0
votes
1answer
622 views

Proper escaping of double quotations for curl post data?

I'm trying to test out a server, by sending it JSON data and reading the response. I need to POST data like {"item":"value with spaces"} but when I use curl I find that it sends the backslashes as ...
0
votes
3answers
108 views

Applying different permissions to files vs. directories

Sunny answered the question above in this post, The answer was given as No need for scripts. // Directories: find . -type d -exec chmod XXX {} \; // Files: find . -type f -exec chmod ...
0
votes
1answer
150 views

Nagios : How to monitor windows host from linux “by command line”?

I need help to monitor windows host using command line in Nagios. As we can monitor Remote Linux host by NRPE (check_nrpe)using command line as : /usr/local/nagios/check_nrpe -H localhost -c ...
1
vote
0answers
26 views

Is there a way to execute the second-to-last command that started with a given string? [duplicate]

In a project with different makefiles: $ make -f foo1.make ... ... $ testing testing ... ... $ !ma make -f foo1.make Good! But then if I by accident do: $ make -f foo1.make ... ... $ testing ...
15
votes
3answers
2k views

Why isn't there any shell command to create files?

Attention please: I am not asking how to make a file from the command line! I have been using touch for making files for years without paying attention that its main purpose is something else. If ...
2
votes
1answer
185 views

Difference between “eval” and “source /dev/stdin”

What is the difference between eval and source /dev/stdin? For example, we can run a list of commands in various ways like this. with eval. comd="ls" eval "$comd" with source /dev/stdin printf ...
3
votes
1answer
144 views

Change script to use whiptail instead of zenity

I'm having difficulty converting some zenity based script to use whiptail instead. The working script looks something like this: #!/bin/bash xfreerdp /v:farm.company.com \ /d:company.com \ ...
3
votes
1answer
97 views

setting output of a command to a variable [duplicate]

How can I put the output of head -15 textfile.txt to a variable $X to use it in an if command like this: if $X = 'disabled' then ?
4
votes
1answer
149 views

One liner for padding columns (similar to printf) of output from the previous pipe command?

I'd normally use printf to pad each cell with enough whitespace to maintain header position over its respective column. Ultimately I can just iterate over each line of the output and do enough cut ...
0
votes
0answers
27 views

What do the number in the file metadata mean [duplicate]

I typed ls -l in the terminal to get the file metadata of all files in the current folder What do the circled number : 1 & 2 represent in regard to the file metadata ???
3
votes
1answer
157 views

bash command line editing (Emacs shortcuts)

When writing a command on the bash command line, I can use CTRL+w to delete a word backwards, or ALT+d to delete word forwards. The problem is, that these two shortcuts are not exactly complementary: ...
1
vote
1answer
431 views

Pass bash script arguments in double quotes to php cli script

I am trying to pass arguments to a bash script and then to a php script, I have literally looked at 30+ links, and tried over a dozen examples, and I for whatever reason have not been able to get the ...
2
votes
3answers
114 views

Tar compress folder without specifying the filename

Is it possible to use tar to compress a folder without giving the filename of the archive to store in? Normally you use: tar -zcvf prog-1-jan-2005.tar.gz /home/jerry/prog I want to do something ...
4
votes
3answers
125 views

Why does export -p exclude $_ variable?

As far I know, there are 3 ways to see exported variables: $ export -p | wc -l 50 $ env | wc -l 51 $ printenv | wc -l 51 As you can see, export -p misses single variable. It's a $_ one: $ diff ...
20
votes
2answers
690 views

How do I move all files output from a command?

I have this grep command to find files without the word Attachments in them. grep -L -- Attachments * I want to move all the files that are output from that command. How do I do that in bash? Do I ...
2
votes
2answers
111 views

What is the bash syntax for extracting the values from multiple instances of the same argument?

I want to use multiple instances of command line paramater such as the -d option used by PHP for passing PHP options. I am currently using the getopts command in bash. With PHP invocation it would ...
3
votes
2answers
422 views

Command Line Photo Organiser Like Shotwell but to run on headless server

Does anyone know of a program (or even bash script) that can take photos from various folders and then consolidate them into one place and organise them into a directory structure by date in the way ...
3
votes
1answer
33 views

Script to dripfeed files

I need to write a script that will check a directory for a given file type, say *.mov, and move up to, say, 50GB worth into another directory. The purpose being that we have a huge bunch of files that ...
17
votes
2answers
627 views

^x^y unix trick for all instances in last command?

One of my favorite Unix tricks is ^x^y, which will take the last command and replace the first instance of "x" with "y". However, I'm wondering if a similar trick works to replace all instances of "x" ...
2
votes
1answer
342 views

Copy files based on date/time from subset of directories

I'm teaching a class where (~80) students are submitting assignments that I can access via webdav, organized by student in directories named by their unique identifier. The students are split into ...
4
votes
2answers
236 views

Dump process's stdin and stdout

I have two processes, let's say Parent and Child. Parent launches the Child and communicates with it through child's stdin and stdout. Parent <-> Child These processes use text protocol and I ...