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1500 questions
83
votes
9 answers
How do I shorten the current directory path shown on terminal?
If I am in a deep directory, let's say:
~/Desktop/Dropbox/School/2017/C/A3/
then when I open up terminal, it says
bob@bob-ubuntu:~/Desktop/Dropbox/School/2017/C/A3/$
and then I write my command.
That is very long, and every line I write in the…
K Split X
- 1,733
83
votes
2 answers
What does dead.letter files do
I find dead.letter files from time to time in my $HOME directory. What they are for?
Maja Piechotka
- 16,676
83
votes
8 answers
grep and tail -f?
Is it possible to do a tail -f (or similar) on a file, and grep it at the same time? I wouldn't mind other commands just looking for that kind of behavior.
xenoterracide
- 59,188
- 74
- 187
- 252
83
votes
13 answers
Why write an entire bash script in functions?
At work, I write bash scripts frequently. My supervisor has suggested that the entire script be broken into functions, similar to the following example:
#!/bin/bash
# Configure variables
declare_variables() {
noun=geese
count=three
}
#…
Doktor J
- 2,622
83
votes
3 answers
How to enable reverse search in zsh?
I recently switched to zsh (finally) and am loving it! So far one thing that I am missing is Ctrl+R to do incremental history search.
I have the history set up properly
HISTSIZE=10000
SAVEHIST=10000
HISTFILE=~/.zsh_history
and I used vi key…
Ali
- 6,943
83
votes
11 answers
Using sftp to Transfer a Directory?
When I try to use sftp to transfer a directory containing files, I get an error message:
skipping non-regular file directory_name
The directory contains a couple of files and two subdirectories.
What am I doing wrong?
haziz
- 2,241
83
votes
3 answers
lsof and listening ports
I am trying to get all the processes listening for a network connection on Mac OS X. netstat does not have the -p option and I am trying with lsof
lsof -i -sTCP:LISTEN
gives me a fair list of listening processes but not all. I can for example…
Matteo
- 9,796
- 4
- 51
- 66
83
votes
3 answers
Can I force dnf to install an old version of a package?
I want to install an older version of package , and when I use dnf it only shows the current version of the package .
Is there any way to install an older versions using dnf ?
0x0584
- 1,352
83
votes
4 answers
Copy file to xclip and paste to Firefox
I'm coping file to xclip
cat file.txt | xclip
I'm pasting without problem with
xclip -o
When I want to paste it to Firefox with Ctrl+V it pastes old text (that shouldn't already be in the clipboard).
When I go back to terminal and run xclip -o it…
xralf
- 15,415
83
votes
12 answers
How to disable line wrap in a terminal?
I need to view large logs files using a bash shell. I was using less to open the files, but since the lines are too lengthy there is some kind of line/word wrapping going on.
Since the files are Log4J logs, and there is a pattern in the beginning…
nunaxe
- 1,003
83
votes
15 answers
How to color diff output?
I wanted to format the Unix files conditionally, I am currently working on diff command and wanted to know if it is possible to format the text of the diff command output.
Example:
Matched values should be displayed in green.
Unmatched values…
Aman
- 1,201
83
votes
6 answers
Listing packages in Yum that depend on another installed package
I am trying to install a 3rd-party RPM package on RHEL5 which depends on version 3.4 of sqlite. According to Yum I already have 3.3.6 installed.
Is there a way to list the installed packages that depend on sqlite 3.3.6?
Rich
- 4,529
83
votes
3 answers
How does /usr/bin/env know which program to use?
When I use the shebang #!/usr/bin/env python to run a script, how does the system know which python to use? if I look for a python bin path in the environment variables I find nothing.
env | grep -i python
tMC
- 1,185
82
votes
8 answers
rsync all files of remote machine over SSH without root user?
I have this command to backup a remote machine. The problem is that I need root rights to read and copy all files. I have no root user enabled for security reasons and use sudo the Ubuntu way. Would I need some cool piping or something to do…
redanimalwar
- 1,057
82
votes
4 answers
How to list processes locking file?
Using flock, several processes can have a shared lock at the same time, or be waiting to acquire a write lock. How do I get a list of these processes?
That is, for a given file X, ideally to find the process id of each process which either holds, or…
Benubird
- 5,912