Glasgow | 25-SDC-July | Aiah Ibrahim | Sprint 2 | Shell pipelines exercises

shell-pipelines/ls-grep/script-01.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
 set -euo pipefail
-
+ls -1 sample-files | grep '[A-Z]'
 # TODO: Write a command to output the names of the files in the sample-files directory whose name contains at least one upper case letter.
 # Your output should contain 11 files.

shell-pipelines/ls-grep/script-02.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
 set -euo pipefail
-
+ls -1 sample-files | grep '^[A-Z]'
 # TODO: Write a command to output the names of the files in the sample-files directory whose name starts with an upper case letter.
 # Your output should contain 10 files.

shell-pipelines/ls-grep/script-03.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+ls -1 sample-files | grep '^[A-Z]' | grep -v '.*[A-Z].*[A-Z]'
 # TODO: Write a command to output the names of the files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.
 # Your output should contain 7 files.
+

shell-pipelines/ls-grep/script-04.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
 set -euo pipefail
-
+ls -1 sample-files | grep '^[A-Z]' | grep -v '.*[A-Z].*[A-Z]' | wc -l
 # TODO: Write a command to count the number of files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.
 # Your output should be the number 7.

shell-pipelines/sort-uniq-head-tail/script-01.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+sort  scores-table.txt  
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with lines sorted by the person's name.
 # The first line of your output should be "Ahmed London 1 10 4" (with no quotes). And the third line should be "Chandra Birmingham 12 6".

shell-pipelines/sort-uniq-head-tail/script-02.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+sort -k3nr scores-table.txt
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with lines sorted by the person's first score, descending.
 # The first line of your output should be "Basia London 22 9 6" (with no quotes).

shell-pipelines/sort-uniq-head-tail/script-03.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+sort -k3nr scores-table.txt | head -n3
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with shows the lines for the three players with the highest first score, in descending order.
 # Your output should be:

shell-pipelines/sort-uniq-head-tail/script-04.sh

@@ -1,7 +1,10 @@
 #!/bin/bash
+#!/bin/bash
 
 set -euo pipefail
 
+sort -k3n scores-table.txt | tail -n2 | head -n1
+
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with shows the line for the player whose first score was the second highest.
 # Your output should be: "Piotr Glasgow 15 2 25 11 8" (without quotes).

shell-pipelines/sort-uniq-head-tail/script-05.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+sort -u events.txt 
 # The input for this script is the events.txt file.
 # TODO: Write a command to show a list of all events that have happened, without duplication.
 # The order they're displayed doesn't matter, but we never want to see the same event listed twice.

shell-pipelines/sort-uniq-head-tail/script-06.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
+awk '{print $1}' events.txt | sort | uniq -c |  awk '{print "There have been", $1 , $2, "events."}'
 
 # The input for this script is the events.txt file.
 # TODO: Write a command to show how many times anyone has entered and exited.

shell-pipelines/sort-uniq-head-tail/script-07.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
+awk '{print $3}' events-with-timestamps.txt | sort | grep -E 'Entry|Exit' | uniq -c
 
 # The input for this script is the events-with-timestamps.txt file.
 # TODO: Write a command to show how many times anyone has entered and exited.

shell-pipelines/tr/script-01.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+cat text.txt | tr '!' '.'
 # The input for this script is the text.txt file, which contains an email.
 # The author got feedback that they're using too many exclamation marks (!).
 #

shell-pipelines/tr/script-02.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -euo pipefail
-
+cat text.txt | tr 'zy' 'yz'
 # The input for this script is the text.txt file, which contains an email.
 # Unfortunately, the author wrote it using a German keyboard which has the Y and Z keys swapped,
 # so every Y should be a Z, and every Z should be a Y!