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Posts tagged directory

BASH> Functions

Mar22
2013
Written by Scott Rowley

The beginning of a list of any functions I have created or found and deem useful:

This function will allow you to type “up ANY_NUMBER” and move that many directories up in the current directory tree you are in. If you you do not specify a number and instead just type ‘up’ by itself you will automatically go up just one directory.

function up ()
{
if (( $#> 0 )); then
COUNTER=$1;
else
COUNTER=1;
fi;
while (( ${COUNTER}> 0 )); do
UP="${UP}../";
(( COUNTER=${COUNTER}-1 ));
done;
echo "cd $UP";
cd $UP;
UP=''
}

Some servers don’t have ‘watch’ installed so I’ve made my own function to replicate it’s basic functionality (updated to work with pipes!)

function mywatch () {
while true
do
clear
date +'%D %r'
echo ''
cmd=`echo $@`
#echo "Command is '$cmd'"
last=`echo $@ | awk {'print $NF'}`
num='^[0-9]+$'
if [[ $last =~ $num ]]; then
cmd=`echo $cmd | sed "s^$last^^g"`
eval "$cmd"
sleep $last
else
eval "$cmd"
sleep 2
fi
clear
done
}

Useage:

mywatch "ls -al" 5

If a second parameter ($2) is not supplied (in this case 5) then 2 will be used and your watch will refresh every 2 seconds.

Easily locate problem directories when space is low on a server. Add the following function to your profile (.profile / .bashrc / etc)

function spaceHog ()
{
du -k | sort -n | awk '
BEGIN {
split("KB,MB,GB,TB", Units, ",");
}
{
u = 1;
while ($1>= 1024) {
$1 = $1 / 1024;
u += 1;
}
$1 = sprintf("%.1f %s", $1, Units[u]);
print $0;
}'
}

Useage:

[17:25:51][user@server][ ~ ]
[$]> spaceHog | tail -10 # To show the 10 largest, change this number as desired.
247.5 MB ./bin
247.8 MB ./.cache/google-chrome/Default
247.8 MB ./.cache/google-chrome
283.4 MB ./.cache
293.2 MB ./.wine/drive_c/Program Files (x86)
423.5 MB ./Downloads
653.6 MB ./IOS_APPS
655.1 MB ./.wine/drive_c
658.2 MB ./.wine
2.7 GB .

Delete (rm) a file by it’s inode number

Occassionally I will (or others will) run a command that ends up accidentally creating some goofy named files such as ‘?[01’. This is actually a character so you can’t just type it in to delete it. For this you can lookup the file name by it’s inode and then delete it.

You can do an ls with an -i option to get the inodes, for example:

[$]> ls -ali
total 8
295188 drwxr-xr-x 2 sasowner sas 4096 Dec 30 11:26 .
295064 drwx------ 23 sasowner sas 4096 Dec 30 11:26 ..
295406 -rw-r--r-- 1 sasowner sas 0 Dec 30 11:26 file1
295407 -rw-r--r-- 1 sasowner sas 0 Dec 30 11:26 file2
295408 -rw-r--r-- 1 sasowner sas 0 Dec 30 11:26 file3
295409 -rw-r--r-- 1 sasowner sas 0 Dec 30 11:26 file4

You could then follow this up with a command such as:

[$]> find . -inum 295409 -exec rm {} \;

However, you probably won’t use this command often enough to remember it unless you are regularly familiar with the find command. Instead, I’ve create the following simple function:

function rmi ()
{
find . -inum $1 -exec rm -i {} \;
}

Then simply type the following after getting the inode of the file

[$]> rmi ######
Posted in BASH, Ubuntu - Tagged alias, bash_profile, bashrc, cd, clear, COUNTER, date, function, monitor, move, navigate, profile, sleep, up, watch

BASH> Recursively set file/directory permissions

Jan19
2012
Written by Scott Rowley

Move to the directory you want to start chmodding files in and run the following:

Recursively set FILE permissions.

find . -type f -exec chmod 644 {} \+

Recursively set DIRECTORY permissions.

find . -type d -exec chmod 755 {} \+

*Note, obviously you can change the chmod number to whatever you want, 777, 600, etc.

Posted in BASH - Tagged chmod, chmodding, file, files, find, permission, recursive, recursively, set, type

Recursively set group permissions to match owner permissions

Oct10
2011
Written by Scott Rowley

I have had need of this multiple times in the past, just making a note of it here:

chmod -R g=u directory_name/
Posted in BASH - Tagged chmod, group, owner, permissions, recursive

Media> Shoutcast ‘No such file or directory’

Jul29
2011
Written by Scott Rowley

You’ve got a 64-bit operating system and you are trying to run the 32-bit variant of Shoutcast.

32-bit Shoutcast on 64-bit OS

# ./sc_serv
-bash: ./sc_serv: No such file or directory

For CentOS, RedHat and Similar:

yum install lib32-glib

For Debian/Ubuntu:

apt-get install ia32-libs
# ./sc_serv
*******************************************************************************
** SHOUTcast Distributed Network Audio Server
** Copyright (C) 1998-2004 Nullsoft, Inc. All Rights Reserved.
** Use "sc_serv filename.ini" to specify an ini file.
*******************************************************************************
Posted in Ubuntu - Tagged apt-get, audio, cast, file, ia32-libs, install, media, no, shout, shoutcast, such, yum

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