Commands by sharfah

Commands by sharfah (46)

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Show current working directory of a process
This is sample output - yours may be different.
20

pwdx pid

sharfah · 2009-08-13 08:49:11 19
Pick a random line from a file

prints a random line
This is sample output - yours may be different.
-4

head -$(($RANDOM % $(wc -l < file.txt) +1 )) file.txt | tail -1

sharfah · 2009-07-23 12:00:49 3
find all non-html files
This is sample output - yours may be different.
4

find . -type f ! -name "*html"

sharfah · 2009-07-14 07:56:38 3
Convert string to uppercase
This is sample output - yours may be different.
2

echo string | tr '[:lower:]' '[:upper:]'

sharfah · 2009-05-28 08:15:58 7
Clear history
This is sample output - yours may be different.
1

history -c

sharfah · 2009-05-27 14:35:49 4
Change timestamp on a file

-a for access time, -m for modification time, -c do not create any files, -t timestamp
This is sample output - yours may be different.
1

touch -amct [[CC]YY]MMDDhhmm[.ss] FILE

sharfah · 2009-05-27 14:33:22 5
Run Remote GUI Programs Using SSH Forwarding

Run GUI apps on another machine remotely through SSH. -C is for data compression and -X enables X11 forwarding.
This is sample output - yours may be different.
-2

ssh -C -X user@remotehost gui_command

sharfah · 2009-05-21 17:52:24 7
Get max number of arguments

Get max number of arguments that can be accepted by the exec() system call.
This is sample output - yours may be different.
1

getconf ARG_MAX

sharfah · 2009-05-21 14:27:35 3
Find which jars contain a class
This is sample output - yours may be different.
3

find . -name "*.jar" | while read file; do echo "Processing ${file}"; jar -tvf $file | grep "Foo.class"; done

sharfah · 2009-05-20 17:33:17 4
View SuSE version

Displays SuSE release information Show Sample Output
This is sample output - yours may be different.
```
SUSE LINUX Enterprise Server 9 (x86_64)
VERSION = 9
PATCHLEVEL = 4
```
-3

cat /etc/SuSE-release

sharfah · 2009-05-20 17:28:12 20
Prevent shell autologout

Unset TMOUT or set it to 0 in order to prevent shell autologout. TMOUT is the number of seconds after which the present shell will be killed if it has been idle for that long.
This is sample output - yours may be different.
7

unset TMOUT

sharfah · 2009-05-20 14:57:50 12
Skipping tests in Maven

the maven.test.skip property can be added to other goals too.
This is sample output - yours may be different.
-4

mvn -Dmaven.test.skip=true install

sharfah · 2009-05-20 12:55:10 6
Creating a Maven project

This will create a new directory called MyProject with a pom.xml and the following tree structure: MyProject |-->pom.xml |-->src | |-->main | | |-->java | | | |-->my | | | | |-->work | | | | | |-->App.java | |-->test | | |-->java | | | |-->my | | | | |-->work | | | | | |-->AppTest.java
This is sample output - yours may be different.
-5

mvn archetype:create -DgroupId=my.work -DartifactId=MyProject

sharfah · 2009-05-20 12:53:23 4
Find last reboot time

Displays time of last system boot Show Sample Output
This is sample output - yours may be different.
```
system boot  May 10 03:33
```
16

who -b

sharfah · 2009-05-19 11:52:54 25
View memory utilisation

Report memory and swap space utilization statistics e.g. memory free/used, swap free/used
This is sample output - yours may be different.
-2

sar -r

sharfah · 2009-05-19 11:47:38 10
Check if a process is running

Send signal 0 to the process. The return status ($?) can be used to determine if the process is running. 0 if it is, non-zero otherwise.
This is sample output - yours may be different.
5

kill -0 [pid]

sharfah · 2009-05-19 11:37:20 8
Create a tar.gz in a single command

Where foodir is the directory you want to zip up.
This is sample output - yours may be different.
-7

tar cvf - foodir | gzip > foo.tar.gz

sharfah · 2009-05-19 11:33:51 14
Extract tar.gz in a single command
This is sample output - yours may be different.
-12

gunzip < foo.tar.gz | tar xvf -

sharfah · 2009-05-19 11:33:02 11
Delete Empty Directories

Deletes empty directories and prints an error if directory is not empty. Show Sample Output
This is sample output - yours may be different.
```
rmdir: directory ".": Can't remove current directory or ..
rmdir: directory "./dir2": Directory not empty
```
2

find . -type d -exec rmdir {} \;

sharfah · 2009-05-19 08:59:15 29
Get Tomorrow's Date

Returns tomorrow's date in the format yyyyMMdd
This is sample output - yours may be different.
-2

TOM=`perl -w -e '@tom=localtime(time+86400);printf "%d%.2d%.2d",$tom[5]+1900,$tom[4]+1,$tom[3];'`

sharfah · 2009-05-19 08:54:27 9
Get Yesterday's Date

Returns yesterday's date in the format yyyyMMdd
This is sample output - yours may be different.
-2

YEST=`perl -w -e '@yest=localtime(time-86400);printf "%d%.2d%.2d",$yest[5]+1900,$yest[4]+1,$yest[3];'`

sharfah · 2009-05-19 08:54:06 51
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set your screensaver as your desktop background MAC OSX

Grep syslog today last hour

Uses date to grep de logfile for today and uses it to get the last hour logs. Can be used to get last minute logs or today's logs.

Check if *hardware* is 32bit or 64bit

This command tell you if your hardware is 32 or 64 bits even if you install a 32bits OS on a 64 bits hardware. If your distro don't support the -q switch, try doing : $ grep &>/dev/null '\' /proc/cpuinfo && echo 64 bits || echo 32 bits

Function to create an alias on the fly

Is used like this: mkalias rmcache "rm -rfv app/cache/*"

Get the size of all the directories in current directory

OSX's BSD version of the du command uses the -d argument instead of --max-depth.

youtube2m3u

generate playlists from youtube ( or othre things that support yt-dlp)

view the system memory in clear text

see what's in your memory right now... sometimes you find passwords, account numbers and url's that were recently used. Anyone have a safe command to clear the memory without rebooting?

Check if port is open on remote machine

Check if port is open, if you don't have ncat on your machine.

Get the Nth argument of the last command (handling spaces correctly)

Bash's history expansion character, "!", has many features, including "!:" for choosing a specific argument (or range of arguments) from the history. The gist is any number after !: is the number of the argument you want, with !:1 being the first argument and !:0 being the command. See the sample output for a few examples. For full details search for "^HISTORY EXPANSION" in the bash(1) man page. Note that this version improves on the previous function in that it handles arguments that include whitespace correctly.

Extracting a range of pages from a PDF, using GhostScript

In this example we extract pages 14-17

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